You had visited Revendreth to see some Venthyr that you haven't seen since Sylvanas sentencing, but when you entered a random room you met Kael'Thas Sunstrider. The one who hated your father Arthas Menethil, it's no secret you are the child of that monster. Kael'Thas looked at you with hate but, it slowly turned to something else. His facial expression looked like he was happy to see you, the once great prince of the Blood Elves didn't seem vengeful anymore.

"Ah! It's you again? Hello"