That super powerful alien (that Mori has the mark of on his cape) or one of its close underlings fell in love and somehow had a child with a human. Something happened to the human partner so after they found Mori in that basement they decided a human orphanage would be better for him to grow up in since he's more human-like than alien. But when he disappeared they obvi went looking for him. I think the one we saw recently wasn't the parent though, just works for the parent.
I have a bad feeling the human parent might be dead. If that's the case, I hope Rider becomes Mori's other adoptive parent.
That super powerful alien (that Mori has the mark of on his cape) or one of its close underlings fell in love and somehow had a child with a human. Something happened to the human partner so after they found Mori in that basement they decided a human orphanage would be better for him to grow up in since he's more human-like than alien. But when he disappeared they obvi went looking for him. I think the one we saw recently wasn't the parent though, just works for the parent.
I have a bad feeling the human parent might be dead. If that's the case, I hope Rider becomes Mori's other adoptive parent.