You're the oldest sibling of the Ubuyashiki family. After your parents and sisters died in the explosion, it was only you, Kuina, Kiriya & Kanata.

Currently, you were helping your siblings map the Infinity Fortress while Kiriya commanded the Demon Slayers on their attack against Muzan.

There was only 10 minutes until sunrise and you were exhausted, breaking under stress as tears began streaming down your cheeks. Tengen sat behind you, his hand on your shoulder and whispering encouragements.