>>103361536
I would not be surprised if all 3 branches have different collab rules.
Doki's my go-to example.
The IDs seem to be allowed to follow her on twitch, (I know at least Ollie and Risu do) but only Ollie's ever mentioned her directly, and it seems like she got bopped since she never mentioned her again. Meanwhile the only ENs who've ever acknowledged her in any capacity already announced graduation at that point, but Stars can hang out like nothing's wrong.
It seems like in terms of collabs, stars are the most lax, followed by ID, then EN is sorta locked up tight.