Amu becomes "Amulet Heart" when she Character Transforms with Ran. The clover decoration of her Humpty Lock changes to the color pink. Amu dons a pink themed cheerleader costume in this form. Her special move is "Spiral Heart" which is executed with the Heart Rod. When Amu does Character Change with Ran, Ran says "Hop, Step, Jump". Ran was seen on Peach-Pit's website before the publication of Shugo Chara!, volume 1.