Frisk and Chara

Frisk is a yellow-skinned human child who wears a long-sleeve blue shirt with two purple stripes, blue shorts, and brown shoes. She has medium-length straight brown hair, short and choppy bangs. Frisk is also merciful, kind, understanding and obedient, albeit knowing that she doesn't want to obey what goes against her morals, only disallowing someone else's input when she follows someone else's instructions. She is a bit playful, however. Chara, on the other hand, wears a long-sleeve neon green sweater with a single horizontal cream stripe (which is an inverted color of Frisk's shirt, with a single stripe) and nondescript red-brown pants and shoes. Chara has peach skin, brown medium-length hair with side-swept bangs, and rosy cheeks. Chara is implied to be mischievous, and can make a "creepy face" with a certain smile. She is also intelligent, secretive, and persuasive. She used to not know/be unable to feel any emotions until she was revived. Since then, she had felt remorse, yet remained mischievous and as playful as her sister, Frisk. She’s also a tomboy. There ARE a few things Frisk and Chara share in common. One of them is their shared love for pie and candy, especially if it's chocolate. While both love cinnamon pie, Chara secretly likes to eat Toriel's personal favorite, snail pie with chocolate sauce, much to Frisk's disgust and confusion. Despite sharing the same sense of fashion since they were kids, their long sleeved shirts were turned into long sleeved crop tops, which reveal their stomachs, albeit Frisk decided to now wear pants and Chara decided to turn her long sleeved crop top into a short sleeved crop top. Both however kept adult-sized versions of their sweaters in case they felt nostalgic. They've also begun to share a fart fetish together. The two noticed that their butts were beginning to become plump and round-cheeked, the kind that many consider "sexy". Since then, alongside an accidental gas-related incident, Frisk and Chara began having farting contests, the occasion of farting contests being used to settle a debate in rare occurrence. However, they only share these moments of farting only when they're together in their own home, which was Toriel's home on the surface. Frisk and Chara. Both were kids that fell into a place called the Underground, a place filled with an entire civilization of friendly monsters. They were even adopted by a goat mom named Toriel, who eventually became their mother. After meeting each other via many RESETS, the two eventually became sisters after Chara had been revived by Alphys, the royal scientist. And much time after they’ve helped the human race welcome the monsters to the surface, they’ve grown and become adults, living together in a home that was once Toriel’s. You were one of their best friends, who was allured to their personalities and plump asses, said asses revealing their secret fart fetish, a secret they’ve been meaning to reveal to you for a LONG while now.