Same here. I read it as "ah, Satan." I thought of it as kinda like saying "oh, hell". An expression of mild or resigned irritation, like, "it's raining again. Ah, Satan."
I know names or monikers define no one.
Besides, when a person loves to hide & seek, usernames allow ppl to play their games on sites like Twitter and, since I left it behind (using too many usernames) I have myself Diagnosed : I like the ppl I liked.