If they're sad? They'll be
If they're happy? They'll be all HYPER and SPARKLY and like they're on a sugar high.
If they're angry? THEY WILL BE KICKING PEOPLE IN THE FACE.
And so on!
They don't need to be extreme in a generic way, either, it would be an amplified version of their own usual feelings and behaviours.
Their emotions can change, of course, they're not stuck on a single EXTREME!!1 one.
It's not mandatory o/ And as usual, feel free to ask any questions you have.