Welcome to the universe of Undertale. Our first character will be Sans. As everybody knows, Sans is the best character in Undertale. He has Ghasterblasters and all this stuff, and a brother named Papyrus, but we'll get on to him later.

This is Sans' brother, Papyrus. He is not as cool as Sans, but he will do the job. Papyrus is the exact opposite of Sans: he is a human-hunting fanatic. He has some weird blue attack. In most pictures, Papyrus is shown making pasta.

This is Ghaster. As everybody knows, he is Sans' dad. He is under the control of someone evil; that's why he fights you. People say he is the creepiest character in Undertale. He is pretty cool.

I do not know anything about Mettaton. I just know what he looks like and that he is created by Dr. Alphys.