Successfully complete the game with the "Good" ending. Start a new game to get the Four Leaf Clover key in your inventory. Use it to enter the Four Leaf Clover room to get the following alternate costumes: Brown as a chair (look at the chair in the Four Leaf Clover room), Gothic Lolita with Maid Brown, Nurse, and Tennis Instructor. You can also unlock Octopus with Crab Brown by finding the October ticket in the "Once Upon a Time" chapter; as well as the Rag Doll with Stuffed Brown by finding four broken robots in the "Rag Princess Sews" chapter.
Rule Of Rose