As far as I know, he just draws himself as a blue skinned big breasted demon woman, because why not. In the volume 7 afterword, he says "a man's got to have guts" so that all I can base it off.
I hated Crown for the longest time, but working on this for so long I guess I've Stockholm'd myself into thinking he's not entirely wrong...... but he's still gotta pay for his transgressions against Gospel.
for lack of a better phrase, she's probably just a 'loser'. took a chance at doing something, fucked up, maybe had a boyfriend cheat on her or something. idk, zyuggers isnt that dark if previous works indicate anything.