If he mentioned he killed Astri's father, then he should be the Monster King.
"I should have noticed she was back. You did a good job hiding her, but you did a terrible job training her. She's capable of much more than this. Thank you for that, actually. Will be easier to keep her with me." The Monster King says.
Lee and Cyprian fly quickly to attack him, but then he creates a dark red, almost black, dagger and puts it on her throat. That made them stop instantly.
"Take me instead of her." Claud says.
"You're nothing next to her, unicorn. She will make me stronger, live forever, and.." He touches her belly in a sexy way. "Carry my Monsters."
He laughs and smells her hair.
"Thank you for bringing her back. Be grateful that I'll let you live. I suggest you find another spouse if you don't want to live in pain." He chuckles and then a black portal appears behind him.