It was Halloween day and everyone all of the sudden turned like their costume for Halloween

Mari was wearing a black cat costume and all of the sudden she became like a real black cat in human style

"huh- what the?" she looks at her new black tail

"Did I just turned to my costume that I was wearing..? I need to make sure that my little brother and the others are fine.... maybe I can talk to Hero later of all of this weird situation, at the least I look cute!`~"