Yan has been as nosy as his programming will allow about all the weird goings on. He hassled Ankh about it for a while at the party, so that might have been noticed. He's also been doing a lot of research online to try to figure out where/when/who his memories were of and sharing anything of importance with Koumei (who he's not supposed to be in contact with anyway. He's also been griping about how his band keeps losing members and making noises about having to consider how to handle his career from now on.