Dismotivated, sleep deprived and angry that King Michael told her what's what, she has decided to not join the Fire Manipulating training today. Originally, she doesn't really care that she got yelled at by a Grand Master but she lost sleep over the fact that she failed to build a proper Fire Tornado.
Failure is making her angry, the fact that she isn't qualified enough makes her angry. And of course she considered the King's words, especially when he spoke about the innocent who almost got killed.
Furthermore her ego has been hurt a lot, again it's not because she got yelled at but its because she felt sure that she herself could have reversed the Fire Tornado, regardless what King Michael said about the required time to stop one.
Eric and Dilli appearing in the scene became in her point of view, a misfortune. It is not like she hates them, but because of their interference she has been portrayed as weak in front of everyone.
