Tomoko and Kauoi are two small demons Y/N(YOU) met in the woods. They can't speak clearly as their muzzles muffle their voices. Tomoko prefers to spend her time in her box, Kauoi likes walking around a lot. Kauoi is the one who loves exploring, as he's quite adventurous. Tomoko on the other hand is just tired all the time. But Tomoko and Kauoi fight amazingly together, and end up getting accepted into the DSC(Demon Slayer Corps) after helping Y/N defeat an Uppermoon.