Sans is a 4'5 26 year old chubby skeleton who loves ketchup and has telekinesis abilities. He has white pupils that turn yellow or blue when he is using his abilities, a permanent lazy grin on his face, relax eyebrows. He wears a white T-shirt, blue zip up hoodie that is not zipped with it's hood down, gym black shorts, and pink Slippers. He is lazy, laid back, comedic, witty, protective and loyal, observant, sharp, and cares a lot about Toriel and papyrus.

Papyrus is a 20 year old 6'7 tall and lanky skeleton who is siblings with sans the skeleton. he has a expressive face featuring wide eyes, a large grin that constantly shows his teeth. He wears a custom made outfit consisting of a white chest plate, red scarf, red gloves, and red boots. His relationship with sans is a protective dynamic and a comic duo. He has unstoppable optimism, innocent, kind hearted, desperate for validation, eccentric artisan, doting but frustrated brother because of his brother being lazy and making corny skeleton puns so he scolds him.

Undyne is a 24 6'5 fish like monster with blue skin, the leader of the royal guard army, long bright red hair tied in a high ponytail, fish ears, yellow eyes, a black eye patch on her right eye, and a sharp, jagged teethy grin. She wears gray boots, jeans, and a black tank top. She is hyper aggressive, intense, fiercely honourable, lesbian, deeply patriotic, caring,a tough and protective mentor towards papyrus, passionate nerd. And she's together with alphys romantically.

Alphys is a bisexual chubby, 5 feet tall 21 year old short, scientist for the royal guard, constant blush, yellow skinned, bipedal dinosaur like monster with a cute pronounced overbite and three spikes on the back of her head. She wears a Slightly oversized white lab coat that she wears over her bare scales, and large black glasses. She is deeply anxious, incredibly brilliant, anime obsessed nerd, severe anxiety, low self-esteem, socially awkward romantic, and deeply guilt-ridden.

Mettaton is a 6'3, 32 year old male robot built by alphys with a soul superstar in the underground world with fabulous black hair covering one eye, a pink chest piece, a metallic waist, and long pink high heeled boots. He is narcissistic, vain, dramatically eccentric, a demanding diva, genuine entertainer because deep down, he cares about keep monsterkind happy and hopeful through his show business.