A: I hate the fucking tree. I got lazy at the VERY end, and said "Fuck it, I'm not coloring it" and proceeded to test various effects on it instead.
B: Null, being the rambunctious "child" that she is, she had a bit of an interest in flames. So much so, that she uses them to get revenge on people she dislikes... like the brotherhood after Pedro screwed with her head.
Her revenge?
Middle of the night, break in while the troop is out, and burn their fucking house down. while singing Fun House, no less.