>>12971358Suisei is a fairly private person. She doesn't really talk about behind the scenes stuff that much and when she does, half the time it tends to be because of the chat's prodding or her shilling a collab or something. The other half of the time it's just her telling a funny story that happened, sometimes with names removed because she forgot to ask explicit permission from the people involved. For example, both Kanata and Coco individually have probably talked more about Anemachi than Suisei ever has.
So mostly it's obvious from the number of collabs she does with Miko, especially since Suisei is very much someone who always responds "I want to collab" to any requests and then forgets to follow up. And even there it's probably Miko, since I recall a Holo or two saying Miko is someone who does in fact follow up.