Mastema

Mastema is a henchman of the Demon Slayer. Long ago, the Demon Slayer saved her from death and she pledged herself to him.

On the day that the Demon Slayer decides to give up his position as a Commander, he gives Mastema a letter to give to the Heroes. She shows extreme concern, but goes through with it anyway.

After she delivers the letter, she is attacked by Akarium, who turns her into a cat. She remains in this form for the duration of the game, trying to find a way to turn back.

Mastema is responsible for the Job Advancememnts of the Demon Slayer. She is able to communicate telepathically with him.