It was an expected development for Nils, and the fight is ok, I suppose. Caroline definitely made the episode better. On one hand, I'm glad that Sei apologized; he was bit mean
, but on the other hand, he didn't really misunderstood Nils. Even if Nils does like gunpla, his priority was still the plavsky particle, and Nils was also a bit insensitive to his fellow competitors.