Responses

First timeline: Kloff 1, Aeroc 1.
Second timeline (the timeline was reset to before they met):
Kloff 2 has nightmares about his alternate version. Aeroc 2 retains all the memories from that alternate life.
Third situation:
An older Kloff 1 (from the first timeline) encounters someone who appears to be Aeroc 1 reincarnated, but without any memories, with an age gap of 20–30 years.
The third situation could be interpreted as a "what-if" scenario—what would have happened if the second timeline had never occurred. It’s more a way to make Kloff 1 face consequences and atone for his sins.
those who are confused by the comments: THERE IS NO THIRD TIMELINE.
There’s the main story of Kloff being a bastard.
And then the second timeline, where Aeroc has memories of the previous one.
Now, the third situation actually TAKES PLACE IN THE FIRST TIMELINE, but here instead of time-traveling, Aeroc reincarnates (his second life within the first timeline), and Kloff, now older, discovers this (years after Aeroc’s death).