???

Aw no I don't think so since I don't think he would know Shic anyway... and it's not like there aren't any other powerful magician near...
I thought he was referring to a demon though I don't know who or then a human he wants to kill for whatever reason...

I agree. I don't think it's shic also since dio was already at the school (looking for someone) way before both rood and shic came to helios.
In my opinion, the person in the middle of all this would be lidusis...and the person he's looking for may be connected to him or something...