she is the element of kindness I think in this episode she was upset because the animals didn't like her also her friends can go opposite of their elements

Pretty much what sweet_cream said. Aside from that bit of rage, she is very kind in my opinion. She's gentle and takes care of her animals, and tried to help Philomena (spelling?) when she was sick. If that's not kindness, I don't know what is!

The fact that she is normally very nice (and represents the element of kindness) is what makes that moment in "The Best Night Ever" so funny. You don't expect it from her! Plus, I think they also did that to emphasise just how stressed she is about the animals not wanting to be around her.

She is till discord messed with her for a little bit, nd the Gala. But she's always nice.