Marissa(aka Sharp Fire) was a girl who was raised by (Ponytale)Scootaloo. When she fell into the Underground with Frisk and Lilly in the Genocide run of UNDERFELL before Frisk killed him Mari became best friends with Fell!Sans. What happens after he goes insane(more than he already is. srry Fell) is explained in this book. Characters (c) me, my bfitwew irl, Lillian and the creator of Dustfell. Picture (c) me Title inspired by the song, Sick Boy by The Chainsmokers Might make this a lemon idk
5 parts