>>58799907Sasaki Saku from Nijisanji's the most commonly thrown example, and the only high profile one I know
The door's supposedly open for Coco, Aloe and Sana if they wish to come back but someone has yet to take up the offer, and it seems unlikely for the first two if I'm going to be honest
Or maybe it's just one of those courtesy things Japan's known for and Cover isn't really interested in having them back
