Ella didn't trust anyone aside from Terrence, but she knew how to get along without trust. She didn't need to trust others because she never let her life depend on someone else. She had a very different view on trust than most people did, but she figured people could at least trust her to think of herself first. That was something, at least. And, hey, she didn't make a habit of going after people who didn't give her a reason to.
Needless to say, she was not at all bothered by whether or not Harry trusted her.
She shrugged at his implied question and said, "It's ironic. I actually really don't like blondes." That and the fact that Emil was apparently with a blonde. Her new name had pretty much been sealed with Ron, aka Barlow, had pointed out that she was not, in fact, blonde. "How's it feel getting rid of the target on your forehead, mate?" She chuckled and lifted her whiskey to take another drink.