Pretty typical for any female to reject the male for awhile after being relocated. The males are always ready to go sooner than the females are. Just keep an eye on it to make sure it doesn't get out of hand. If she continues to totally reject him & refuses to be interested in the long term you may need to try a new female (remove the old one) if you want them to breed. If there's plenty of cover in the tank then they might well be able to share the tank without problem even if they do not pair up.
Typically with kribs its the female trying to sell herself chasing the males all around until they pair.
For pairing and spawning the female will normally color up their bellies VERY dark and/or bright red and kind of do a sideways swim dance in front of the male trying to show her beauty (saying hey I am ready to spawn your babies).
Once the male accepts the female thats when the aggression can begin even if they are not activly spawning yet. The aggression I noticed is normally only towards other kribs at this point.
I would put some video up of it for you but I only have kribs that are already paired with no other kribs in the tank. Its very easy to know the courting dance once you see it and as I said it with kribs its the female who does the courtship dance.
Once they have paired when I have seen the males do their little dance when they are within a day or so of spawning. I have only ever watched the male do this after they have selected a cave or alcove to spawn in. He would then dance in front of it as though trying to coax the female in there to lay eggs. Once he does the female will lay eggs on the sides or roof of whatever they spawned in and the male will go in and fertilize them.
Nice. Your first and last pictures would be GREAT ones to share for people who have a hard time sexing kribs.
Another thing thats really neat to see very easily is that the males can change color very quickly. Mine goes from a bland grey color with no stripe one second to a brilliant almost white with yellow and black stripes the next.