Apparently DraxDrilox speaks Spanish, also thinks this is Danbooru material, which is rather funny since we dont celebrate Halloween around here (Mexico)
Given that he's a furry, it's probably retractable. The other costumes are pretty good: Uryu makes an awesome dracula, Orihime looks really cute as a ghost (and given her experiences in the manga for a while, it's nice to see her happy), and Rukia manages to be cute and make me feel funny at the same time.