Lunatic Charm is a character transformation from the manga and anime series Shugo Chara!, which centers on the magical adventures of Amu Hinamori and her friends. Lunatic Charm is the Character Transformation that occurs when Amu combines with her Guardian Character, Eru, and a Humpty Lock that has been corrupted. This form is a dark version of Amulet Angel, manifesting unique powers and a gothic appearance. Lunatic Charm represents a conflicted and mysterious side, playing a key role in pivotal story moments.