He Xuan doesn’t know why, but the ghost’s blessing and the curse at the same time has followed him into this life – he cannot forget anything. Firstly, the former ghost thought that Harry had this trace because Voldemort held He Xuan memories, and so other ones were automatically saved somewhere. But this little skill has left even after their disappearance, which is quite confusing. The former ghost tends to assume now that it is because the wake up actually happened at a very early age and it was the body’s way to maintain two sets of memories and at the same time keep the personality, but there is no way to check this theory.