Mizuki likes to uploads MVs online. They were captivated by Yoisaki Kanade's music upon listening to it. Kanade saw the MVs Mizuki made and invited them to her circle.

From what has been seen in events and episodes of the main story that reveal Mizuki's past, it is shown that they've been treated like an outcast for as long as we get to see. One day in middle school, they headed to the rooftop for "no reason", only to find Rui, who came to the rooftop almost everyday. Mizuki was hesitant at first, but the two eventually became friends that skipped class and kept eachother alive. In the present, Mizuki still skips school, only going every few weeks so they don't have to retake the grade. But when they do attend school, rumors spread as people stab them in the back they talk behind. As of the Kamiyama Festival, they have become friends with Nene, Tsukasa, Akito and Toya.

Mizuki is a moody person and Kanade thinks they only act on their own principles. They tend to get frustrated and upset whenever they're ridiculed for various reasons, and they strongly desire to freely express themselves, without holding back or being made fun of due to just being who they are. They're also obsessed with cute things.

Despite their energetic, carefree, and sometimes childish demeanor, Mizuki is shown to be, on more than a few occasions, the most mature member of Nightcord., as Ena herself admits in one of her card stories. They often assume the role of mediator in arguments, breaking things up and settling things down whenever they sense that the air has become too heated. They’re fairly introspective, and are therefore usually the one to suggest breaks when they notice that their fellow members have grown tired or particularly stressed out. Where Kanade tends to intensely hone in her focus, Mizuki keeps their attention at least somewhat rooted in reality, able to sense changes in tension and atmosphere in the group. They are able to come to fairly nuanced conclusions about issues, as well as people, as is evident in the way they spoke of their feelings towards Mafuyu disappearing; describing how they would feel but acknowledging that it is not Mafuyu’s responsibility to respond to, or feel saved by, their feelings.

For better or for worse, they have a very strong learned sense of boundaries: when to involve themselves in the affairs of others, and when to involve others in their own affairs. They make sure to acknowledge that they themselves are bound to have little understanding of others’ struggles before proceeding to offer an opinion. They carry with them a strong recognition of the struggles their fellow members face, and with this comes a belief that the group isn’t an appropriate space to share their own struggles. It seems that they stay secretive, to an extent, from an understanding that everyone has their lies.

Mizuki's Introduction: https://www.youtube.com/watch?v=u7vu0ubr_nM

IMPORTANT: Mizuki is Non-binary (or genderqueer in my opinion) so a mix of a boyish and feminine voice will do!