Making Mod Characters Mechanically Like Normal Characters?

[HotRodPrime]

Sorry if this has been asked before, I tried to check through the forums but couldn't find anyone asking this. I was curious if it might be against ToS to create a mod character that is mechanically the same as characters that already exist in game, e.g. I want to make Steve from Blue's Clues, but I want him to function just like Willow. The reason why is because my friends like to play with minimum gameplay changes, but I still wanna look like different characters.

[Well-met]

there's no problem with perks.

The issues begin to arise if you use paid skin graphics