You read the title. First of all, she never did anything to mess up AT (from a logical point of view) So what if she has some anger issues, nobody's perfect. You can't blame her for being born in the fire kingdom. All peeps there are evil. She makes the main charachter happy, which is good ( we all like finn) If she died,(which is some people's biggest dream) finn would get all depressed and no one would slay the beasts of Ooo, causing chaos, and one of the biggest threats to Ooo would be flame king, after hearing of his daughter's death, (and who wants to deal with him, Billy, we don't know if he's dead or alive) so please, PLEASE,PLEASE stop hating her. She did'nt kill you.