To be fair on the mother and grandmother, they don't really get yet that Akira is not minding the change. Bear in mind that initially the kid was very boyish and associated that way, and when their gender changed they were distraught about it. So they currently see the way they are and act as them hiding themselves, trying to fit in and do stuff they aren't uncomfortable with. The grandmother here didn't want Akira coming because she was worried that she wouldn't like how she is being treated, and Akira has yet to have the confident to admit that they are happy as they are right now.
Also, you mean the mascot wasn't temporary mascot? What? I feel cheated! Lied to!