Just as a little before RP knowledge anyone who knows Jaden or just see's him around school his real name Keanu is unknown, for as long as he has gone to Hogwarts he has always said his name is Jaden and no one has ever heard other wise ^^ there is a reason for it so you knows, not just random haha. 

An as for his past he has kept it to himself for the most part. Anyone who cares to know him will know he lived in London until he was six then went to live with his grandfather in Surrey. Other then that he doesn't talk about it. He is rather mysterious but I love my own personal little character plot twists :P

Also the scars I pre-mentioned in his bio he keeps them covered, a simple magical enchantment he does daily to conceal them.

Just throwing this out there so you all know about it.