[Reference] OtherStory!SanZ

SanZ is not the true Sans of the Universe he lives in. he killed the original to take his place and safe the monsters from the humans.

He is part of the scientists and works together with AlphyZ.
He lives with his brother, who dislikes his researches and they tend to end up in smaller fights against each other.
But they love each other deeply.

SanZ is the one who is responsible for the disappearance of any human that ever arrives on the surface. He takes them away to his private and secret lab to provide them doing anything bad to the monsters. He fears that one day they could try to start a new war against the monsters.
In his lab he does experiments with these humans, which mostly lead to their death. What botheres SanZ in no way, because he keeps a grudge against the humans as they locked his real family and friends in his original Universe in the Underground.
SanZ tries so control himself, but if he sees a humans he has to remember all the pain and horror he had seen in his original Universe and wants them to feel the same pain on their own (Especially when he thinks about Chara, which appeared in his Universe several times. She never appeared in this Universe though).
He won't show his true feelings in any way and tries to be the funny guy on the outside. The same goes for his true existence which he keeps a secret from this universe's inhabitans.

He owns a motorcycle but uses it for sleeping rather than driving.
Likes:
- coffee!
- pumpkins
- spicy food
- Favourite drink is : 'Sweet Science'
(he can take quite a lot without getting a hangover. Even though there is no chance he could ever win a drinking-competition against Undyne. Depending of the brand SanZ drinks, his behaviour is influenced. Rum makes him flirtatious, Whisky makes him offensive)

After using a special attack of his where he summons a bone which will start building fractals as soon it hits somewhere/something. Those will spread uncontrollable and are dangerous blades.
This takes a lot of power from him though. As a result he will turn into a different form. In this form his left wing splits into two, he gets black claws, a long tail and (spinosaur-)spikes on his back.