Your love is overflowing. Totally 100% behind you there. She is my 2nd oshimen after Kotoko. I think the main reason that keeps Kotoko surviving in Nogi is because of Karin. There was a showroom with Karin, Ayane, and Kotoko building gundam, and then the audience asked to Karin who is she close to. And then Kotoko said "You can say it, you know. Just say my name". It's tbh unexpected that Kotoko is actually a girl that can say something cheeky like that. She shows no restraint in front of Karin (and Kanarin, lol see the similarities). And also she does a lot to tie the 2nd gen and 1st gen together. Suika is so unique because it crosses over generations. It's cruel of me I once thought that Suika is a group of underdogs (really sorry), and then there it is they manage to get Nishino in. Then I realise, ah it's the same thing like Kotoko, Nishino also needs someone like Karin/Junna. Or perhaps Karin just attracts shy introverted people, and care for them really well. Karin is a great and respectable person. Someone that everyone can aspire to be. Hoping there will always be great things ahead of her.