User blog comment:Rainshadowed/It's Halloween!/@comment-24617443-20151031103620

Wearing the character that they are based on.

Akiba dressed as Hakumen from Blazblue.

Nymbus dressed as Rengar from League of Legends.

Scarlett dressed as Slayer from Guilty Gear.

Though she isn't done yet, the last member of Team SSAN, Summer Astraea Aurora, would cosplay as Imca from Valkyria Chronicles 3.