Nico Yazawa

"'µ's9!'""-roll call""'S.W.A.T µ's9!'""-second roll call"Nico Yazawa (矢澤にこ) is µ's9 of the Muse Rangers

Personality
Though upbeat, cheerful and sticks to her motto 'Keep Smiling', Nico is self-centered, abrasive and a complete anti-hero. She's a third-year student alongside Eli and Nozomi but has a child-like appearance, which leads to others, including her own team, to mistake her as a grade-schooler, much to her dismay. Despite her selfish attitude, Nico is very caring, especially towards her younger siblings. Her catchphrase is 'Nico Nico Nii!'.

Background
Nico's father was one of the scientists that sacrificed their lives to imprison the Viruszoids. Thus, Nico grew up not knowing her father. Her younger sibling triplets 12 years later and took good care of them, especially when her mother is rarely around because of her hard-labour work.

Nico did whatever it takes to make her siblings happy by pretending to be an idol for them. She entertains them by saying 'Nico Nico Nii" as a motivation to be happy, however, this led her to be self-centered towards others, leading her to be disliked by everyone, apart from her family.

Staring her third and final year of high school, Nico witnessed µ's Battle Robo defeat Virus Hacker. Nico is the seventh girl to join the Muse Agency, however, she refused to join, saying it doesn't suit idols and begins to do things against the Muse Agency. Maki then stopped her for doing this, convincing her that joining the agency will help her protect those she loved. Because of that, Nico became µ's9, equipped with the µ'sHammer and µ's9 Chopper.

She became S.W.A.T µ's9 with her teammates

Nico continued to be self-centered throughout the series. Her team later discover that Nico is revealing her identity as a Muse Ranger to her siblings but with false claims, saying she's the leader and she calls her teammates her minions. Her teammates get angry with this, as Maki convinces her that its best to be who she is. Fighting against Virus Diva, µ's9 reveals the truth to her siblings, who forgives their older sister and vows to become a Muse Ranger like her, much to Nico's delight.

After the final battle, Nico goes to college in Kyoto but promises Maki that she will come back.