Ayato: He won't look like he's freaking out, but he is. He'll say that it's cosplay.
Kanato: Kanato will freak the fuck out. He'll try to find something to try and fix his species.
Shuu: Shuu will shrug it off. He likes cats, so it won't bother him so much.
Laito: Laito will full out seduce you. He knows what girls like these days. They're all about nekos in his mind.
Suburu: Suburu will be confused and irritated. He'll go around asking how to get them off.
Reiji: Reiji will find it to be a joke and will start experimenting with the new transformation.
Ruki: Ruki will find it ridiculous and will go around searching for a solution.
Kou: Kou will find them adorable, and will try seducing you with them.
Yuma: Yuma won't give a damn about them. He'll flat out ignore the ears and tail.
Azusa: Azusa won't freak out, but would hate them. He'd try cutting them off.