I've Fallen in Love with Your Eyes!
Amu encounters Misaki Watarai, an energetic girl who is also in love with Tadase. After Saaya Yamabuki, head of Tadase's fan club, chides Misaki for Misaki's energetic personality and misunderstanding Tadase's conversation with Nadeshiko, Misaki becomes heartbroken and Nikaidou extracts Misaki's egg, but it hatches into an X Character.
Aired 24/11/2007EP 8 - I've Fallen in Love with Your Eyes!

Shugo Chara!
Amu Hinamori is a 5th grade transfer student who is fashionably cool, tough and independent. Despite this, she is also a girl who seems unapproachable, both at home and at school. In reality, the "Cool and Spicy" role she plays is just a facade that she unconsciously plays. With her guardian characters, she fights the Easter Company who is extracting people's eggs to create X Eggs & X Characters in search of a special egg called the Embryo.
(Source: Crunchyroll)