Sorry for it being a while, check out the other ones if you're into it.
Papyrus and Sans drive Frisk (and Chara) to embassy, where Frisk work as the ambassador for the monster. "Hey kid, are you alright?" said Sans "yeah, why do you ask that?" "I don't know, you just seem down to me". "Sans, it's alright" "trust the human Sans, I'm sure in no time the other humans will know we are nice".
They dropped off Frisk at the embassy "take care of yourself kid" "don't worry, I'll be fine" Frisk said leaving. Sans saw Frisk open her eye a bit when she left, seeing a red eye, reminding him of the genocide route. Sans eye started turning blue "Sans, are you okay?" "Oh, yeah Papyrus, just not sleeping well".
"So, you work on keeping monster safe?" said Chara "more like help each, human and monster, get along". After a few hours, they started talking about sending monsters back to the underground "I tell you all, these monsters don't deserve to be here" "I object, a lot of the monster are too nice to attack someone, even a human". "My first defense, Monster kid" Monster kid step forward "really, another monster?" "please, I'll show you how peaceful he is; Monster kid, make a insult" "oh, uh, I, hate your guts?".
"You see, they don't mean anything to hurt us" "now, hold on". "You obviously can't believe this, she probably just told the kid what to say, how do we know she isn't a monster". "That what you people always think" "huh?" "You keep saying that monsters have killed a lot of us, but how many have you killed without a reason". they stayed quiet "that's right, how many monsters have you killed without talking to about it" Frisk revealed her eyes red "would you still be human, or another monster".
In the end Frisk won the debate for the monsters in another city. "Your welcome by the way" Chara said letting Frisk take control of the body. "How the heck did you do that?" "Remember, I'm part of, so I'm also able to control you". "Well, anyway, thanks, I don't think I could have done that" "what, speak out? You just need to have confidents" "you learn confidents?" "yeah, from Toriel" "I'm amazed I never learned that" "give it time".
"Say, Chara, do you ever wish you had a body again" "why would I need a body when I got you, besides you're not getting rid of me that easy". "Well, it's not about me dying, it's about you being alive again" "hm, I don't know, I don't think about it that much". "Speaking of which, let me give you a snack" Frisk said taking out and eating some chocolate "oh my gosh, it's so delicious!" "I thought you like it" "don't think this getting you off the hook for killing you, don't worry about me".