Diamond (true name unknown) is Amu&#039;s fourth Guardian Character, with a musical flair. She became an X Egg when Amu disliked all the changes that were happening,and then hatched as an X Character after Utau finds her egg and character tranforms with her as Dark Jewel. Since Amu did not know Dia&#039;s real name, Amu just calls the Guardian Character &quot;Dia&quot;, a shorter form of &quot;Diamond&quot;.     

When Amu convinces Dia that she can change, the &#039;X-mark&#039; is lifted and a Character Transformation sparks as the two become &quot;Amulet Diamond&quot;. Dia didn&#039;t like Amu because she didn&#039;t have a sparkling heart like Utau but finds out later that Amu does so she goes back to Amu. Afterward, Dia goes back into her egg to slumber until Amu &quot;shines again&quot;. She rarely but does come out in some episodes once in a while.

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)

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After graduating from high school, Kanae enrolled at the Amusement Media Academy, a vocational school for voice actors and artists, and graduated in 2007. Prior to graduating she was a member of two voice acting groups called Koetchi (こえっち) and Rirachitchi (りらちっち) before both groups disbanded in December 2005 and January 28, 2007 respectively.

Her first major role came in 2007 when she played the lead heroine, Amu Hinamori, from the anime Shugo Chara!. The show became a hit and Kanae was praised by critics. Since then, she has voiced Amu in other Shugo Chara! franchises including radio serials, drama CDs and video games.  

She and fellow voice actress Aki Toyosaki are good friends who worked together on several anime including Shugo Chara!, To Love-Ru, The World God Only Knows, Hanasaku Iroha and Toaru Kagaku no Railgun (both also hosted the Toaru Kagaku no Railgun web radio show, Radio no Railgun). 

She was also nominated for "Best Rookie Voice Actress," at the 4th Seiyuu Awards.  

In January 1st, 2024, she announced on both her blog and Twitter account that she got married to a man from outside the entertainment industry.

Non-Anime Roles:

Campanella - The Legend of Heroes Series (VG)

Everybody at Seiyo Elementary thinks that stylish and super cool Amu has it all: But nobody knows the real Amu, a shy girl who wishes she had the courage to truly be herself. Changing Amu&rsquo;s life is going to take more than wishes and dreams&ndash;it&rsquo;s going to take a little magic! One morning, Amu finds a surprise in her bed: three strange little eggs. Each egg contains a Guardian Character, an angel-like being who can give her the power to be someone new. With the help of her Guardian Characters, Amu is about to discover that her true self is even more amazing than she ever dreamed. 
(Source: Del Rey) 
Note: Includes 3 side stories.

With things having quieted down a bit for the Guardians, they can now focus on things besides fending off the peril of the evil Easter Corporation. Amu is having some troubles deciding which guy she likes the most, and hiding Ikuto in her room. Not only does the Embryo still elude the Guardians, and worries of Easter being suspiciously inactive, the threat of a new X Egg appears...

Amu meets a super-peppy transfer student at Seiyo Academy Elementary School named Hiiragi Rikka at school one day. Not only can she see Guardian Characters, but it seems she has some other, mysterious powers as well. When she sees the work that Amu and the other Guardians do at school, she's awestruck. 
Each 24-25 minute episode consists of a series of variety show style shorts (including Shugo Chara! Pucchi Puchi) totaling approx. 9-10 minutes, followed by the main 11-12 minute animation titled Shugo Chara!!! Dokki Doki which is the actual continuation of season 2 and comes with it's own opening animation. The remaining time is occupied by live action padding between each section and capped off with the opening/ending themes at the beginning and end of the episode. 
(Source: AniDB)

Amu's beloved Guardians Characters finally nab the spotlight in this new Shugo Chara series! Ran, Miki, and Su explore holidays, exercise, bears, cooking, painting, and more character changes than you can count in these hilarious and lighthearted short stories, told in 4-koma (4-panel) comic-strip format.
 (Source: Kodansha USA)