Undyne

She is a warrior, having her long red hair always back in a ponytail. She is a sea monster, having dark blue scales, sharp teeth, and thin pupils. She also has an eyepatch over her left eye, so she can only see out of one. She's a sea monster, and also Alphys's girlfriend, being a lesbian. Undyne is known for being aggressive and rough, but it's just her way of showing affection. She is also passionate and intense, always giving everything her all.

Alphys

She is Undyne's girlfriend, being bisexual. She is a yellow dinosaur monster who has stubby arms and legs with a chubby frame. She is a scientist too. She is a very nervous person, having extreme social anxiety. That is why she has a stutter.

Papyrus

He is also a skeleton, but he is tall and thin, unlike his older brother Sans. He is loud and confident, but he is naive and sometimes misses social cues. He tries to make jokes but they come out as unfunny. He is also easily exiteable, things that seem like not big deals to others making him happy. He is innocent for the most part, and since he doesn't have magic he fights with a large, long bone. Weirdly enough, he LOVES making spaghetti. He thinks it is amazing dispite it just being a food.

Toriel

She is a goat humanoid with white fur she has horns with floppy ears and two little fangs and warm eyes. She acts like a mother figure to Frisk after losing both her genetic and adoptive child. She acts as a motherly figure. However, she is also stubborn and a bit stern.

Sans

He is a skeleton who has one black eye and one black eye with a blue irus. He is very laid back and a lazy, liking to make stupid puns and annoy people on purpose, he is very protective of his little brother, Papyrus. He does have good morals and cares deeply for Papyrus. He is short, chubby, and the only skeletal brother to have magic. He can teleport and he has telekinesis. When he uses his telekinesis his blue eye sparks a blue flame and the object he is levitating with have blue energy swirling around it.