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This article contains details about plotlines described in the anime.
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Cocoro Yazawa is one of Nico Yazawa's siblings.


In Season 2 Episode 4, it was revealed that Nico had three siblings, Cocoro, Cocoa and Cotaro. Like her siblings, Cocoro believed her older sister was the star of μ's.


Cocoro has an apparently calm personality among the Yazawa siblings besides Cotarou, shown on how she reacted when she first met the other members of μ's.


Ep. Title
04 "No. 1 Idol in the Universe"
(宇宙No.1アイドル "Uchuu Nanbā 1 Aidoru")
S2Ep04 00165
In Episode 4, while the other members of μ's were looking for Nico, Hanayo Koizumi saw a little girl who looks a lot like Nico. They then learned that she was Nico's little sister, Cocoro. While Cocoro was leading them to their home, they learned that Nico told her siblings that she was the center of µ's and the others were her backup dancers.

On the way home, Nozomi Tojo tells the others that Nico was telling her siblings all that even after she failed to become a super idol in her first year because she didn't want their vision of her to be destroyed. After hearing this, the girls arrange for Nico to give a special performance for her siblings, claiming it to be her last performance as a 'solo idol' before joining her fellow idols as equals in μ's.

09 "Melody of the Heart"
(心のメロディ "Kokoro no Merodi")
54 S2Ep09
In Episode 9, the day of the final preliminaries arrives. At Nico's house, Cocoro and Cocoa practiced doing Nico's signature move, "Nico Nico Nii". Nico felt happy and told her two sisters that they'll definitely pass the preliminaries. Nico told her siblings that she'll sing her heart out as center, after all, everyone in µ's is the center.
13 "Come True! Everyone's Dream"
(叶え!みんなの夢―― "Kanae! Minna no Yume")
24 S2Ep13
In Episode 13, Cocoro, along with her mother and siblings, met Honoka Kosaka, Rin Hoshizora, Maki Nishikino, and Hanayo at the school gates and attended Nico's graduation ceremony.


  • Cocoro's surname Yazawa means "arrow" (矢) (ya) and "marsh" (澤) (sawa/zawa).
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