Mikey would come off as rude and immature towards them, seeing as he had to move into Izana's bedroom due to his old room being occupied by you. Izana would likely have the same reaction as Mikey for similar reasons, although they happen to be more calm about it. Shinichiro would likely want for everyone to get along, as well as play the role of an older brother or someone to look up to. Emma would likely not care as long as the new person is nice to them.