i really though it would be the girl, since she is still alive and love was flourishing in his heart. it was also something quite new in his mind, since he spent a lot of time not long ago with her.
i really didn't think it would be his family, because they are actually all dead already and he retrieved their 'thing', that was already a kind of closure, at least for now.
so he is actually doing the trial right? kind of? taking one 'thing' from each level, so it can add to his arsenal. maybe in the way those guys did before, they will never succeed.