Simred

Prushka

Prushka is the adoptive daughter of the White Whistle Delver Bondrewd. She lives with him at the Forward Operation Base. Prushka is a cheerful and amiable girl who loves her adopti

Reg

Reg is a robotic being who appears to be a little boy. His actual age, origins, and even name are unknown because he cannot recall anything about his life before his encounter with

Nanachi

Nanachi is a Narehate — a person who’s survived the 6th layer’s Curse of the Abyss and has been left deformed as a result. Unlike other Narehates, Nanachi has retained a sound mind

Bondrewd

Bondrewd is a legendary white whistle delver who has made many great discoveries about the secrets of the Abyss. A researcher fascinated by the Abyss, he has often resorted to ille

Riko

Riko is the only child of the legendary White Whistle Lyza, the Annihilator. When she was two, her mother began her last dive to the bottom of the abyss. She was left under the car

Faputa

Faputa is referred to as "Princess of the Narehate" by the inhabitants of the Narehate Village Ilblu within the inviolable 6th layer of the Abyss. She is described by Majikaja as "

Gyarike

Gyarike is a member of the Umbra Hands, also known as Ashen Gyarike due to his flamethrower Artifact. Umbra Hands with white coats, like Gyarike, are combat types equipped with pow

Gueira

Gueira is a member of the Umbra Hands who is stationed at Ido Front. He was in charge of taking care of Prushka as a child.

Meinya

Meinya is Prushka's pet given to her as a present from her adoptive father, Bondrewd, as her 10th birthday present. Its name is a result of Prushka not being able to pronounce "Mei

Marulk

Ozen's assistant and a Blue Whistle Diver.

Ilim

Ilim is one of the children brought down in the depths of the abyss by white whistle Bondrewd, together with Mitty and Nanachi. Later on, it's highly likely that she is one of the

Vueroeruko

Vueko, whose full name is Vueroeruko, is a mysterious woman who was chained by her neck in a deep pit of sludge beneath Ilblu before Riko set her free.

Belaf

Belaf is one of the Three Sages of Ilblu.

Majikaja

Majikaja, or sometimes just Kaja, is a Narehate living in the village Ilblu. They can understand and communicate using human speech, though they sometimes forget words, and sometim

Jiruo

Jiruo is a Moon Whistle Delver who serves as a teacher for Apprentice Delvers from the Belchero Orphanage in the town of Orth. While he works as an instructor for the children, he

Wazukyan

Wazukyan is one of the Three Sages of the Village of Ilblu.

Laffi

Laffi is Hablog's wife and owner of a shop in Orth. She is well-liked by Riko and the other orphans, who frequent her shop. Riko often using her telescope to observe Abyssal wildli

Mepopohon

Mepopohon is a Narehate in Ilblu. During their stay in Ilblu, Riko rents a room in their lodge. The meal they made gave Riko bad indigestion.