Thomas: you're dressed like a scary doll and he is dressed like a crazy doll master. Thomas got the idea because you're short and cute.
Newt: you're dressed like a vampire and he is dressed like a werewolf.
Minho: you're wearing a wedding dress with holes and a lot of blood and he's wearing a suit with holes and a lot of blood too. So you dress like a zombie pair.
Gally: you're dressed like Mario and Luigi