Name: Sans Bell / Age: 30 / Pronouns: she/her / Height: 4'9
Appearance: short skeleton monster with hot pink eyelights and magic created lashes. her tongue and ecto-body are also hot pink, but has sparkles scattered throughout. her attire consists of a sleeveless black turtleneck, a cropped dark pink jacket over the top, dark pink cargo pants that reach mid-calf and black boots. on her left wrist is a small, round crystal chime that was gifted to her by her AU's Papyrus and Frisk.
Bell's world was once full of colour and whimsy before the war between humans and monsters. once monsters were chased underground, colour faded from the surface world, leaving it dark and depressing. for many years, monsters lived peacefully underground, going about their lives while their King went mad trying to figure out how to break the barrier keeping them trapped in the earth without having to use the Soul's of humans.
From her laid back personality, you wouldn't be able to tell that Bell can be serious when needed, though her need to be so only comes around once in a blue moon. for example; when Frisk falls into the Underground and arrived in Snowdin, she warned them that if they hurt a single monster, she wouldn't hesitate to end them. she followed Frisk during their entire time in the Underground, not at all trusting this little human. she was genuinely surprised that at no point does Frisk even threaten a monster, choosing to spare them every time.
By the time Frisk reaches Asgore, Bell has to step in since he has lost his mind and may end up being destructive and she didn't want a kid involved in that. a fight between the two broke out, Bell trying desperately to keep Asgore away from Frisk, while Asgore tried to claim Frisk's Soul.
An attack missed Bell when she dodged and landed on one of her Gaster Blasters and hit Frisk instead, tearing a sizable gash in their arm. Bell immediately dismissed the Blasters and tended to them. however, when the blood splatter came into contact with the barrier, to everyone's shock, it shattered. the revelation that Soul's were never needed to shatter the barrier left Asgore speechless.
Once the monsters began to make their way above ground, colour began to return to the surface world. unable to locate Frisk's family, Toriel offered to adopt Frisk, and it's only a little while after settling in that Frisk and Papyrus gift Bell with a pink crystal chime.
Song: The Pink Killing Floor - Varien