I don't think she's particularly repentant. She's just all "go with the flow". She'll relax with the crew if they want and practice hard with them the next year. She doesn't regret doing so, and doesn't feel like she should be punished for it - which is how I understand the word repentant.

I actually quite like her. The pony tail might have something to do with it.

I don't mind Aoi. She's just an example of all the other "fakers" typical of a Japanese achieving society. At least she's found her priorities now.

I'm hold more dislike for the "ribbon hair" girl who hates Reina just because she's outdoing her trumpet-senpai.