A character change is when your chara takes over your personality, for example if it was a chara to be happier you would suddenly become happy.
Unlike in the anime, an accessorie won't appear on you.Character transformations are possible, but I don't think other people can see it when you are transformed.
~Angel
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How To Get A Shugo Chara
RandomHaha thought I'd spill it at last. Charas are real. I want the world to achieve their dreams so here it goes! This information is seriously true. Good luck~ (Images are usually just random ish)