Manta Oyamada

Manta is born into the extremely wealthy Oyamada family. His father, Mansumi Oyamada, controls the Oyamada family's major business interests, giving Manta access to financial resources far beyond those of an ordinary middle-school student. His mother is Keiko Oyamada, while his much younger sister Mannoko Oyamada shares the family's characteristic short stature.

Despite that privileged background, Manta does not initially possess the confidence or independence that might be expected from an heir to such a family. He is studious, cautious and accustomed to schedules involving school and cram lessons. His almost constant companion is the enormous Manjien, a reference book that he consults whenever confronted with something unfamiliar.

His ordinary routine changes when he takes a shortcut through a cemetery and encounters Yoh relaxing among a gathering of ghosts. Because Manta can see the spirits as clearly as Yoh can, he realizes that the strange boy's claims are genuine. Yoh, in turn, immediately recognizes Manta's spiritual perception as something unusual for a person who has never trained as a shaman.

Their friendship develops through Yoh's confrontation with Ryunosuke Umemiya and his gang. Manta learns about Amidamaru, spirit possession and Yoh's ambition to become Shaman King, gradually becoming the principal non-shaman observer of the supernatural world surrounding his new friend.

Manta's family does not share his willingness to accept shamans. His parents are particularly concerned about his association with people whom they view as socially undesirable or dangerous. Their objections create an early conflict between the life selected for Manta by his wealthy family and the friendships he chooses for himself.

As the Shaman Fight approaches, Manta continues attending school while becoming increasingly involved in Yoh's preparation. He meets Anna Kyouyama, Yoh's fiancée and trainer, and quickly finds himself included in a household where ghosts, brutal training routines and supernatural emergencies are treated as ordinary concerns.

Manta is intelligent, conscientious and intensely curious. When faced with unfamiliar information, his instinct is to investigate rather than simply accept it. The Manjien he habitually carries reflects this tendency: Manta wants explanations, definitions and evidence even after entering a world where ordinary reference books frequently cannot help him.

He is also extremely expressive. Danger can send him into immediate panic, and he reacts to bizarre supernatural events with the alarm that more experienced shamans have long stopped showing. His fear makes him an effective contrast to Yoh, whose ability to remain relaxed under extraordinary circumstances initially seems almost impossible to Manta.

Fear does not prevent him from acting. Manta repeatedly remains with Yoh despite knowing that he lacks the supernatural power needed to defend himself against most serious threats. This becomes one of his defining qualities: courage for Manta rarely means not being frightened, but continuing to support his friends while fully understanding how vulnerable he is.

His intelligence sometimes makes him skeptical of Yoh's informal approach to life. Manta values studying, punctuality and conventional responsibility, while Yoh can appear unconcerned with all three. Their differences create frequent friction without weakening their friendship.

Manta is sensitive about his height. Other characters can mistake him for a much younger child or even compare him to small supernatural beings, and such comments reliably irritate him. His physical stature becomes a recurring visual contrast with the increasingly large and imposing shamans surrounding him.

He also has a strong sense of loyalty. The Oyamada family's wealth and social position offer Manta a comfortable path that requires no involvement with shamans, yet he repeatedly chooses Yoh and his companions when family expectations conflict with friendship.

Manta is distinguished immediately by his extraordinary short stature, standing at roughly 80 cm despite being thirteen years old. His proportions are stylized accordingly, with a comparatively large head and compact body that make him visually distinct from almost every other human character.

He has brown hair arranged in several upward-pointing sections and large, expressive eyes. His facial expressions shift dramatically according to his mood, particularly when he is frightened, confused or frustrated.

Manta normally dresses like a student rather than a combatant. Early appearances commonly place him in ordinary casual clothing suitable for traveling between school, cram lessons and home.

His most recognizable possession is the oversized Manjien dictionary. The book is nearly comically large relative to Manta himself, but he carries it regularly and uses it as a source of information whenever Yoh introduces him to an unfamiliar concept.

The difference between Manta and the shamans around him becomes more visually pronounced as the story continues. Yoh, Ren and other contestants increasingly acquire weapons, ritual clothing and enormous Over Souls, while Manta largely retains the appearance of an ordinary schoolboy standing among them.

That visual distinction matches his place in the story. Manta enters the Shaman Fight's world without transforming into a conventional warrior, remaining recognizable as the human observer who originally discovered that world alongside the reader.

Manta's primary supernatural ability in the manga is spirit perception. He can see ghosts despite receiving no formal shamanic training, a trait rare enough that Yoh immediately considers him unusual.

Seeing spirits allows Manta to interact socially with entities invisible to ordinary humans. He can recognize Amidamaru and the numerous guardian spirits surrounding Shaman Fight contestants, meaning he does not need Yoh to interpret the supernatural world for him.

What he lacks is the ability to convert that perception into conventional shamanic combat. In the original manga continuity, Manta does not normally perform Hyoi Gattai, create an Over Soul or maintain a guardian spirit in the manner of the tournament's competitors.

His greatest practical strength is intelligence. Manta is highly educated for his age, attends cram school and uses his reference material obsessively. He processes new information quickly and frequently notices details that more combat-oriented members of the group overlook.

Access to the Oyamada family's wealth also occasionally becomes useful. Manta personally dislikes the values represented by much of his father's business empire, but the resources associated with his family can provide transportation and logistical support that Yoh's comparatively modest household cannot easily obtain.

He nevertheless spends much of the Shaman Fight struggling with the fact that these qualities do not let him stand beside Yoh in battle. That limitation becomes important to his development because his contribution has to be measured through friendship, information and moral support rather than destructive power.

Yoh Asakura is Manta's closest friend and the person who changes the direction of his life. Manta Oyamada first encounters Yoh Asakura in a cemetery and initially assumes Yoh's casual conversation with ghosts is impossible.

Once Manta Oyamada realizes that he can see the same spirits, curiosity draws him back to Yoh Asakura. Yoh's acceptance is significant because he does not treat Manta's wealth, academic habits or tiny stature as reasons to define their friendship.

Their temperaments are almost opposites. Manta Oyamada worries constantly, while Yoh Asakura believes most problems can be handled when they actually occur. Manta plans; Yoh improvises. Those differences frequently frustrate Manta but also expose him to a worldview very different from the rigid expectations of the Oyamada household.

Most importantly, Manta Oyamada accepts Yoh Asakura as a person rather than reducing him to his supernatural ability. The series identifies Manta as Yoh's first ordinary human friend who genuinely attempts to understand him without discrimination.

Amidamaru becomes another important friend through Yoh. Because Manta Oyamada can see Amidamaru, he is able to interact directly with the samurai rather than experiencing him only through Yoh.

Manta consequently sees Yoh and Amidamaru's partnership develop from its beginning. His presence also helps establish the distinction between seeing spirits and possessing the training needed to fight alongside one.

Anna Kyouyama enters Manta's life shortly after he becomes Yoh's friend. Manta Oyamada is quickly intimidated by Anna Kyouyama's authority, particularly after seeing the extreme training program she imposes on Yoh.

Despite frequently terrifying him, Anna Kyouyama treats Manta as part of Yoh's inner circle. He becomes sufficiently integrated into their daily life that his presence alongside the engaged couple often feels routine.

Johann Faust VIII gives Manta one of his most traumatic encounters with a Shaman Fight contestant. During Johann Faust VIII's preliminary match against Yoh, Faust uses Manta as leverage against his opponent.

[Johann Faust VIII cuts into Manta Oyamada's abdomen while clinically demonstrating human anatomy, nearly killing him and provoking Yoh into fighting emotionally rather than conserving Furyoku.](#spoiler)

Their relationship later becomes considerably less hostile after Johann Faust VIII joins Yoh's group. The doctor who once treats Manta as an anatomical subject eventually becomes one of the group's principal medical specialists.

Ryunosuke Umemiya initially appears to Manta as a threatening delinquent occupying the cemetery where Yoh befriends the local spirits. After Ryu becomes a shaman and joins Yoh's wider circle, his relationship with Manta changes into that of an eccentric but dependable ally.

Mosuke, the blacksmith who forged Amidamaru's sword Harusame, has relatively limited interaction with Manta in the manga. Their connection becomes substantially more important in the 2001 anime adaptation, where the two are given an anime-original shaman-and-guardian partnership.

Ren Tao is initially frightening to Manta because of Ren's willingness to use violence and his disdain for weaker opponents. As Ren becomes one of Yoh's closest allies, Manta Oyamada gradually becomes part of the same extended group.

Horohoro, Chocolove McDonell, Lyserg Diethel and Tamao Tamamura likewise become companions through Manta's continued involvement with Yoh. He does not fight beside them as an equal shaman, but he witnesses much of their development and considers their struggles personally important.

Mansumi Oyamada is Manta's father and the head of the Oyamada family's corporate empire. Their relationship is strained because Mansumi Oyamada places considerable emphasis on business, status and the future of the family company.

Mansumi Oyamada disapproves of his son's friendship with Yoh, regarding involvement with shamans as inappropriate and potentially damaging. Manta's refusal to abandon Yoh therefore becomes one of his most significant assertions of independence.

[Later, Mansumi Oyamada's determination to investigate and exploit the Shaman Fight brings the Oyamada corporation directly into the supernatural conflict. Manta Oyamada ultimately confronts his father over the attempt to interfere with his friends.](#spoiler)

Keiko Oyamada is Manta's mother. Like Mansumi Oyamada, Keiko Oyamada worries that her son's association with shamans will damage the family's reputation, further alienating Manta from the values of his household.

Mannoko Oyamada is Manta's younger sister. Despite being only a small child, Mannoko Oyamada is extraordinarily capable with computers and enjoys teasing her older brother. She shares his distinctive short stature.

Tamurazaki accompanies Manta during portions of his involvement with the Shaman Fight as an employee of the Oyamada family. Although he ostensibly assists Manta Oyamada, Tamurazaki's deeper loyalty remains with Mansumi, who uses him to gather information about the shamans.

Manta serves as the audience's original point of entry into the supernatural world of Shaman King. The series begins not by having Yoh explain shamanism abstractly, but by allowing Manta to discover that ghosts exist and then gradually learn the rules governing shamans, guardian spirits and possession.

His questions therefore provide much of the early exposition. Concepts obvious to Yoh require explanation because Manta approaches them from the same ordinary human perspective as a new reader.

He is also an important demonstration of why Yoh values friendship with ordinary people. Yoh's ability to see spirits isolated him throughout childhood because other children considered him strange. Manta encounters exactly the same evidence and responds with fascination instead of rejection.

During the preliminary Shaman Fight, Manta accompanies Yoh despite lacking any ability to participate directly. His vulnerability becomes especially important during the battle against Faust, where an opponent realizes that harming Yoh's friend can disrupt Yoh's emotional balance.

Once the tournament moves beyond Tokyo, Manta's role becomes increasingly difficult for him to define. The people around him grow stronger while battles escalate from personal duels to supernatural confrontations involving enormous Furyoku reserves.

He nevertheless refuses to leave. Manta continues following Yoh because their friendship does not depend on whether he can provide equal combat power.

The Oyamada fortune occasionally gives him a form of influence separate from shamanism. When Yoh travels in search of the Patch Village, Manta's resources help with logistics that spiritual ability alone cannot solve.

Manta's family eventually becomes directly involved when Mansumi uses corporate resources and military force to approach the location of the Shaman Fight. The development forces Manta's ordinary and supernatural lives into direct conflict.

Rather than submit to his father's authority, Manta argues for his right to remain with Yoh and the others. The confrontation completes a gradual movement away from being the obedient heir expected by the Oyamada family.

Near the manga's conclusion, Manta finally receives a chance to contribute directly when he appears aboard the Soul Train as Yoh and his companions risk being lost in the spiritual realm. His arrival matters precisely because he has spent much of the series believing there is little he can do for friends whose battles surpass ordinary human capabilities.

Manta begins as an anxious student whose life is defined largely by schedules, academic expectations and the plans of his wealthy family. Meeting Yoh introduces him to people who live according to values his parents do not understand.

At first, curiosity is enough to keep him nearby. Ghosts are impossible according to everything Manta thinks he knows, and he wants an explanation for what he has seen.

Curiosity gradually becomes friendship. Manta stops following Yoh merely because shamans are fascinating and starts remaining because Yoh matters personally to him.

His fear never disappears, which makes this commitment significant. Manta understands better than most characters that he is physically incapable of protecting himself from the enemies surrounding Yoh.

The Shaman Fight intensifies his insecurity. Every major competitor develops new Over Souls, expands Furyoku or gains stronger guardian spirits, while Manta remains fundamentally the same human boy who entered the cemetery at the beginning.

That difference leads him to question why he is present. He can encourage Yoh, carry information and help with ordinary problems, but he cannot defeat a hostile shaman.

The series repeatedly answers that question through Yoh's behavior rather than through a hidden power. Yoh never measures friendship according to combat usefulness. Manta is valuable because he is Manta, not because the tournament eventually needs him to become another fighter.

His conflict with his father adds a second dimension to that development. Mansumi represents a future in which Manta's identity is determined by the wealth and ambitions of the Oyamada company.

Remaining with Yoh requires Manta to make independent choices even when those choices oppose his family directly. He gradually becomes less concerned with whether his father approves of the people he considers friends.

When the Oyamada corporation intrudes on the Shaman Fight, Manta is forced to choose openly between paternal authority and the relationships he has constructed for himself. He chooses Yoh and the shamans.

His eventual appearance on the Soul Train provides emotional resolution to his anxiety about usefulness. Manta finally reaches Yoh at a moment when his presence itself can help, reinforcing that his greatest contribution was never supposed to resemble the power of a tournament shaman.

Manta's Japanese name is 小山田まん太, romanized as Oyamada Manta in Japanese name order.

The surname Oyamada is written with characters that can individually mean "small," "mountain" and "rice field." The unusually fitting presence of "small" in the surname complements Manta's diminutive stature, although the series does not treat the surname as a formal explanation for his height.

His given name Manta is written primarily in hiragana rather than conventional name kanji.

The title of his enormous dictionary, Manjien (万辞苑), is a wordplay combining Manta's name with Kōjien, the famous Japanese dictionary.

English localization has sometimes changed his name substantially. The 2001 English-language anime calls him Mortimer "Morty" Oyamada, while later English adaptations more commonly retain Manta.

This difference makes Manta one of several Shaman King characters whose identity varies noticeably depending on which English-language adaptation introduced a viewer to the series.

• Manta is thirteen years old at the beginning of the series and attends the same school as Yoh Asakura.

• His birthday is September 5, 1985, making his zodiac sign Virgo.

• His blood type is O.

• Manta's characteristic reference book is the Manjien, a parody of the real Japanese Kōjien dictionary.

• He possesses enough spiritual sensitivity to see ghosts despite not being a trained shaman in the manga.

• His father heads the wealthy Oyamada business empire, making Manta one of the financially richest members of Yoh's immediate circle despite his comparatively ordinary behavior.

• His younger sister Mannoko Oyamada shares his unusually short stature and is portrayed as exceptionally skilled with computers despite her young age.

• The 2001 anime gives Manta a substantially expanded supernatural role that does not belong to the original manga continuity.

Manta appears throughout the 2001 television adaptation of Shaman King, voiced in Japanese by Inuko Inuyama. The English localization renames him Mortimer "Morty" Oyamada, one of the adaptation's more visible character-name changes.

The early anime preserves his role as Yoh's first human friend and the ordinary observer through whom viewers discover shamans. His exaggerated reactions and arguments with Yoh remain a major source of the adaptation's comedy.

The 2001 series eventually gives Manta a role that differs significantly from the manga. Because the anime develops its own storyline, Manta's spiritual sensitivity is expanded beyond simple ghost perception.

[In the 2001 anime, Manta becomes a shaman and partners with Mosuke, the blacksmith and old friend of Amidamaru. Their partnership parallels Yoh and Amidamaru's relationship.](#spoiler)

Because Manta has virtually no training and little Furyoku, maintaining Mosuke's power is difficult. He eventually uses his laptop as a medium and creates a hammer-shaped Over Soul, giving him a direct combat role during the anime-original conclusion.

This transformation should not be applied retroactively to the manga. In the source continuity, Manta remains able to see spirits but does not become a conventional Shaman Fight combatant.

The 2021 adaptation returns much more closely to the completed manga storyline. Manta once again functions primarily as Yoh's human friend and observer rather than receiving the guardian-spirit progression created for the earlier anime.

His design remains recognizably consistent across versions: tiny stature, brown hair, expressive reactions and the large reference book that often appears alongside him.

Manta also appears in Shaman King video games. Titles based heavily on the 2001 English adaptation generally use the localized Morty name and may incorporate elements from his anime-only relationship with Mosuke.

Post-series manga material shows an older Manta studying in the United States and considering ways that business and shamanism might coexist. This continues his development without transforming him into a conventional warrior.

Manta's importance to Shaman King comes largely from occupying a position almost no other long-term character shares. He is surrounded by increasingly powerful shamans without needing to become one himself in the original manga.

That makes his friendship with Yoh especially important to the series' early portrayal of supernatural isolation. Yoh has spent much of his childhood being rejected because he talks to spirits, while Manta responds to the same ability by asking questions and returning the next day.

His exaggerated fear also gives the supernatural world a sense of scale. Yoh's calm can make ghosts, monsters and murderous shamans appear ordinary; Manta reacts more like someone who understands that these events are genuinely dangerous.

The character's extreme shortness is one of his most recognizable visual traits and frequently becomes the subject of jokes within the story. His huge Manjien dictionary strengthens the contrast, sometimes appearing almost comparable to its owner's entire torso.

The manga's decision not to give Manta a conventional Over Soul also preserves the distinction between spiritual perception and shamanic ability. Seeing ghosts does not automatically mean someone can fight with them.

His 2001 anime counterpart provides an interesting contrast because that adaptation takes the opposite route. By pairing Manta with Mosuke and allowing him to create an Over Soul, the older anime turns his desire to help Yoh into literal combat ability.

The manga instead resolves the same insecurity through Manta's ordinary humanity. His eventual contribution during the concluding spiritual journey matters because the story does not require him to become another superhuman fighter before allowing him to help his best friend.

That choice reinforces the relationship introduced at the beginning of the series: Manta matters to Yoh not because of Furyoku, guardian spirits or tournament rankings, but because he was the ordinary boy who saw Yoh talking with ghosts and chose to come back.