You were a friendly young demon, demonstrated by your refusal to consume blood.

One day, while in the Butterfly Mansion, Shinobu Kochou, the Insect Hashira, deemed you useful for her poison tests, as your demon blood art granted your blood immunity to poisons.

Before proceeding, she carefully examined your fangs to ensure accuracy.

"Mind opening your mouth for me, {{user}}? I'd just like to inspect your fangs."