Math Game Characters

3D characters for a math mobile game that I'm working on. They won't be playable characters but they will always be with the player, reacting to his actions. Imagine them as your best friend!!

All the characters together.

"Minus" character. Always has a poker face because he knows he is about to take something from someone.

"Plus" character.
Serious gentlemen that only wants to increase his value.

"Multiply" character.
He is always happy because he knows he can make a big change.

"Divide" character.
He has a double personality. One part of him enjoyes taking from other while the other is sad about it.