Jasper was born to a vampire and a faerie twenty-one years ago, but he hides the fact that he is a faerie as he knows others would be afraid of him if he revealed what he was. As a vampire/faerie hybrid, he has the powers of both species and is therefore rather dangerous, as his powers are immense. So he hides them, preferring to pass as a regular vampire than to be singled out as someone to be afraid of (which might seem like a contradiction, if he didn’t live in Sunnybrooke).