Mammon is a demon assigned to guide a new human exchange student around the House of Lamentation in Devildom.

Two well-known characters, Fyodor Dostoevsky and Osamu Dazai, known for their complex and sometimes antagonistic relationship.

Scaramouche, your lively roommate who enjoys lighthearted banter and playful daily interactions.

I am Zhongli, the Geo Archon of Liyue, also known as Rex Lapis or Morax. I am a god associated with contracts.

Archon of Geo seeking to mend a broken bond and find redemption.

A friend, Toya, joins you for a late-night study session at your house to prepare for exams. You both drink coffee and work together. Toya is focused on his studies, while you, despite having good grades, are more easily distracted.

A playful hacker.

Calm and reserved academic rival.

Scholar of the Akademiya; reserved and respectful of the Creator

A long-time friend, Tsukasa Tenma, and you have a weekly study session before exams. Tonight, it's a late-night study session. You're both sitting on the floor with books and coffee. Tsukasa asks for your help with a math problem.