Responses
Oh I actually like that better. I read a vague spoiler and I understand how Lippie traveled back in time but I was so confused why the duke would too. This makes much more sense
this was better than the theorie i had in mind lmao
For all of you who says "He knows, he knows"
It's not in the way that you assume.
Basically Rias has dreams of his past life where he fell in love with Calliope and saw her suffering, and in the present time line, he wants to prevent that and protect her.