Rin was the most excited for her debut. They talked a decent amount predebut and kept in frequent contact for Riro's first few months. They also did a cover together and iirc Rin said a while ago they were working on something else together too. She's definitely not feeling good about the whole thing. Assuming she doesn't cancel today's stream, she'll likely address it for a bit at the start of the beginning and move on afterwards. She's always been good at ignoring retarded superchats so she'll be fine.