ChocoBlook is the ghost of Chara with no memories. They venture through the underground, helping Frisk. Eventually, they regain their memories and beat Asriel on a Pacifist route. Chara talks to Asriel in the ruins later. Chara accidentally possesses Asriel mid-argument. They’re confused for a bit, then figure out that it’s possible because Asriel doesn’t have a soul to get in the way. Alright, good to know, but talking over each other in the same body is weird so they’re gonna unpossess Asriel now. Chara fails to unpossess Asriel. Being a ghost, they are of course capable of fusing with a body given intense enough emotions. Arguing with their dead and also dying brother was enough to do that, so now Chara and Asriel are stuck together in a fun goat body. After freaking out over this, Chara comes to an incredibly important realization. Asriel is not allergic to chocolate, and there is a bar in Toriel’s fridge. Asriel is judgmental about Chara’s priorities. Chara says shut up, they’ve been through a lot, let them enjoy their chocolate. They return to the remains of the barrier, and there is Another tearful reunion scene. Then, finally, they head to the surface. Everyone stands around admiring the sunrise for a bit, and then Azzy slips away. Go ahead. Annoy the irritable goat and ghost.