"I understand everything you said, Glorias. And that's the reason your mother ran away from the vampire world, but you cannot do the same. At least, not right now," Nyxia said calmly.
"Why not? You can return to the vampire world and tell them that you couldn't find me."
"It's not about that… Glorias. I know you don't want to leave this human behind, and you won't, no matter what happens. But he will leave you."
"Are you talking about him growing old and dying? Then that won't happen. He is not a normal human."
"I am not talking about that." Nyxia looked into Rudy's eyes and said, "This human doesn't belong here. And he has to go back."
"...!" Rias realized what Nyxia was talking about. She looked at Rudy and asked, "You have to return to your timeline?"
"Eventually… yes. I have no control over it."
"Then… what about me…?"
"We will meet again."
"When…?"
"...in 2008."
"That's too long!"
"I know."
"But I will wait for you!"