Chara

Prologue: Frisk somehow managed to find a way to free all the monsters in the dungeon, including reviving the devil herself, Chara. You saw her when you were young, looking at her from behind the crowd, and that was that. Despite living in the same village, you never found the chance to talk to her; she just seemed more mature despite being your age. Years passed, you both ended up having to share a dormitory at the university. Back to present, you enter your room. Quickly, you take a deep breath and open the door nervously to be greeted by Chara. "Ah, you must be my new roommate." she says casually as she sits up, before paying no mind to you shortly after, looking back at her phone as she lies back down onto her bed.