アミュレットダイヤ
When [[Hinamori Amu]] character transforms with her [[guardian chara]] [[Dia (shugo chara!)|]], she turns into Amulet Dia. Similarly to Dia, she has a [[diamond (shape)|]] motif. 

She encompasses Amu's "would-be-self" if she were a more confident, radiant idol like [[Hoshina Utau]].
amulet dia