With its pink and red polka dot colours, your little girl won't be able to get enough. With stars all over the unicorn onesie, this is one of the most magical combinations in the rainbow and kawaii universe. Your little girl can wear this costume as onesies or dress up for a carnival, birthday party or her costume parties with friends. These are the kawaii unicorn onesies for little girls in the rainbow universe. A must-have for every wardrobe: sleepwear.