Orca

Orca initially behaves playfully, smiling easily and appearing almost innocent even when demonstrating potentially lethal ability. His comfort around dolphins and the sea reinforces the relaxed first impression.

That demeanor conceals an appetite for serious combat. Orca is fascinated by powerful riders and does not need much encouragement to test himself against them. He can move from casual conversation to dangerous confrontation without the emotional buildup expected from a conventional antagonist.

His personality also makes him relatively adaptable in his loyalties. After experiencing Kogarasumaru's strength directly, he becomes willing to help riders he previously approached as enemies rather than maintaining absolute loyalty to Genesis.

Orca follows the Bloody Road and can produce Fangs through the same fundamental acceleration-and-braking mechanics used by its other high-level riders. His first major display immediately establishes his proficiency: he counters Agito's Fang with his own and destroys the target Agito had been attacking.

His environment is closely associated with water. Orca swims with exceptional ease and can use his mobility around the sea as part of combat, making an island setting particularly favorable to him.

As a Gravity Child, he possesses enhanced spatial perception and physical ability. His shadow and visual motifs resemble a killer whale or sea dragon, matching both his name and the aquatic character of his movement.

His fight with Buccha demonstrates the danger of his Fang attacks but also exposes the limits of relying on them against an opponent capable of enduring and adapting to enormous physical force.

Orca first appears around Chapter 185, initially shown playing with dolphins while Yasuyoshi Sano and Aeon Clock are involved with Genesis's overseas operations.

He later reaches the island where Kogarasumaru is training. His effortless interception of Agito's Fang immediately establishes him as a Bloody Road rider capable of challenging the Fang King's specialty rather than simply another Genesis subordinate.

Orca is part of a preemptive operation involving Genesis's overseas allies against Kogarasumaru. During the island conflict he faces Buccha, whose unusual physiology and immense physical strength give Orca a very different opponent from Agito.

After his defeat, Orca's relationship with Kogarasumaru changes. He later contributes to their side rather than remaining exclusively aligned with Genesis, becoming another example of a powerful opponent drawn into Ikki's wider coalition.

Agito Wanijima attracts Orca's attention as another Bloody Road rider. Orca's ability to counter Agito's Fang establishes an immediate technical rivalry between them.

Issa Mihotoke becomes Orca's major opponent during Kogarasumaru's island training. Buccha ultimately defeats him, after which Orca's relationship with Kogarasumaru becomes less hostile.

Yasuyoshi Sano encounters Orca through the larger conflict involving Genesis and its overseas forces.

Aeon Clock is present around Orca's introduction and the overseas operations connected to Genesis.

Pyon is Orca's sister and another figure associated with the forces operating outside Japan.

Sora Takeuchi is connected to the operation that brings Orca and other overseas fighters against Kogarasumaru.