>>276431427Part 3 is mostly the Polnareff Show, but him constantly being the centerpoint of most arcs does mean that the cast generally feels tightly knit, at least around him. Because everything centers on Polnareff, everyone else being close to him lets them feel close, too.
Part 4 has more of an ensemble cast, but there are a few degrees of separation between some of the ends. So the overall group doesn't feel as close. Koichi almost becomes Part 4's Polnareff. But he disappears after Sheer Heart Attack. After that we get a cliquey feeling. Where there are groups that get along, but they don't intersect much with others.