Kid the Phantom Thief

Later on in the series, a fourth (yellow) egg named Diamond is born. Unlike Amu's other Guardian Characters, she is only seen a few times in the series. Due to Amu's mixed feelings before Diamond was born, she becomes an X character and is "stolen" by Utau Hoshina, who uses Diamond for her concerts planned by Easter. Later on, Diamond is purified and becomes a regular Guardian C...