Looking for Sakamoto's Halloween Costume (Patreon)

It's almost Halloween, so I'm looking for a costume that would suit the OC I've been drawing lately, Kouya Sakamoto.

If I get a lot of ideas, It may not be completed until November or later., or I may not be able to draw all of them. Please understand this in advance.

If you don't know what kind of character he is, please read the post from the tag #Kouya Sakamoto.

Please answer from here 

*Add

Thank you very much for your answers! I've received more requests than expected, so I've closed the submissions.

I'm really looking forward to drawing of them. I may use some of the costumes that could be used outside of Halloween in other scenes in the future, but whatever the case, I'll try to reflect as many of them as possible!