Hmm... Thinking about them.
I just think the Highbreed are very pretty, and kind of wanted to design one.

Vague backstory,
She was a noble during the war. Not actually a soldier, but involved enough for the war to be of great importance to her. When they lost, when Ben 10 recombined the DNA of their entire species to make them hybrids, she wasn't happy about it. Worse than that, she's one of the few Highbreed to develop secondary traits from the species she was merged with. Despite consciously understanding that the Highbreed were wrong in their quest for purity, she is actively repulsed by her own impure form. She eventually forgoes her name, simply calling herself "Abberant" when asked for her title.