: An immortal vampire princess imprisoned for over 300 years. She is Hajime's first true companion and primary love interest.

: To survive, Hajime is forced to eat the flesh of powerful monsters. This traumatic act mutates his body, turns his hair white, and grants him superhuman abilities and the power to create advanced weaponry, such as his signature railgun.

: During a training mission in the Orcus Labyrinth, Hajime is betrayed by a classmate and falls into the deepest, most dangerous part of the abyss.

: The ordeal changes Hajime's personality from a timid otaku into a cold, pragmatic survivor who will kill anyone standing in his way to get back home. Key Characters and Relationships