Ame is rightfully trying to move on from her gremlin past and settle down into a more respected position now that she has control over her community.
https://www.youtube.com/watch?v=0SUV1akceuII think gura is doing the same but more so just as a sobering up experience wherein Kiara is going full regression mode and embracing her smug kusotori persona after years of trying to be a textbook prim and proper idol. Some kind of weird swapped polarities shit going on with that lot.