Shugo Chara !!

  Hello!
well I think Shugo Chara is a very nice anime isn't that right?
It's about a high school girl "Amu Hinamori " At first her classmates
refer to her as "cool and spicy".
However, her real personality is that of a very shy girl who has trouble showing her true personality. One night, Amu wishes for the courage to show her "would-be" self, and the next morning finds three brightly colored eggs-red, blue, and green in her bed .At first, she is alarmed, but realizes she must have really wished to change . These eggs hatch into three Guardian Characters: Ran, Miki, and Su . Amu's life becomes much more complex as she struggles to deal with her "would-be" selves and the Seiyo Elementary's Guardians, who recruit Amu as the Joker to search for X Eggs and X Characters, the corrupted forms of people's dreams .

Meanwhile, the Easter Company is extracting people's eggs in search of a special egg called the Embryo. The Embryo is believed to grant any wish to the one who possesses it. It is described as an all white egg while normal heart's eggs have a yellow heart and yellow wings on it.
Later on in the series a fourth egg is born, this egg contains the Guardian Character Diamond of Hinamori Amu's set. She is only seen a few times in the series. However due to Amu's mixed feelings she becomes an x character, until about halfway to the end, where she was purified of the X on her, and then would appear in times of heavy crisis.
You should watch it ;) it's a very nice anime :)

                                   ^~~By Misha~~^