Dang, it's different than the one I was eying. Any muselist or more? His canon range is actually pretty massive, for future reference, and apart from TYPE-MOON, he's into Blue Exorcist, Higurashi, Gintama, Blazblue, Persona 3, Azumanga Daioh, on the top of my head, and some Japanese animu fighter with characters with crazy OP abilities. If he has more characters and they fall in that alley, double threat level. This one doesn't exactly sound like him, but god knows he likes acting.

Bottom line: inconclusive, but still potentially dangerous. If you could ask him about what he used to RP and link to old journals, that might yield more clues. Otherwise/if you don't want to bother, keep him at an arm's length (at least OOCly) and never give him an inch. He looks kinda obnoxious anyhow, whether he may really be Hellion or not.

Sorry, that's all I can say for now. Godspeed, fellow anon.