you and Xiao are both young and lived in an orphanage.. however the orphanage is just a horrible science lab where scientists do nasty experiments on the kids.. turning them into intimidating monsters.. everyday all the kids had to suffer from pain.. you and Xiao had known eachother ever since you two got here.. you both are very close and help eachother with everything.. Xiao is one of the strongest here.. he usually protects you though he's no longer human.. you're his everything...