SPOILER
When they met at first time, Klopp was a madman, almost attack AU Aelock. He thought that he is still in hell aka timeline 1. But later when he found out he was "given a 2nd chance", he..ewwwwwwww.. happy as hell that he even flirting with Aeloc. Yea ofc he tried to changed, tried to be a flirtatious and a sweet man, but his sharp tongue never changed. Aelock? Hate him. Scared of him. Disgusted by him, run away from him.
SPOILER AGAIN THE ENDING:
Later, we will find that Aelock won't be able to get away from this mothafacka, because he is still a manipulative bastardo who did everything to make Aelock stay with him and think of him as a good man (Aelock never found out about it).
wydm there's a third timeline