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One of the NPCs in Blue Archive and a former member of Gematria.
He sees the world of Kivotos as if it is a board game or TTRPG, such as calling the current academic city setting of Kivotos as a "codex".
He was freed by Francis but Francis was killed afterwards by snapping his neck.
He seeks for the answer of 6th Koan of Jericho: "Is the truth that does not exist really the truth?".
In its process, he used Hoshino as his puppet and almost killed Sensei in the process, turned Hoshino into her "Terror" state through pushing her to the limit and reminding her of the guilt and trauma related to Yume. He was caught by Sensei as he introduces himself to him and showed the "Adult Card" which he accused as cheating.
After losing in all of his plans and The Fury of Set, Shiroko Terror put him at gunpoint, but was spared and sealed forever in his dimension.
The following tags are aliased to this tag: basement_dweller_(blue_archive) (learn more).