Project SEKAI Wiki
Project SEKAI Wiki
This page can only be edited by admins Akiyama Mizuki is unknown Akiyama Mizuki is a member of 25-ji, Nightcord de.
As of current, Mizuki's gender identity is unknown. Discussion regarding the topic is encouraged, however, please remain respectful to other users with different opinions regarding their gender identity. Please do not state any theories to be canonical or fact as nothing has been confirmed.

Associated pages

"I welcome anything as long as it’s cute♪"
―Akiyama Mizuki

Akiyama Mizuki (暁山瑞希) is a first year student at Kamiyama High School. They're the animator of the underground music circle 25-ji, Nightcord de., also known as Ni-go, going by the alias "Amia".


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.

Mizuki's gender identity is currently classified as "unknown".

Mizuki has a secret no one in the circle knows about. They are also classmates with Shiraishi An in 1-A.


Mizuki has light pink eyes and light pink hair worn in a ponytail.


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 Night Code, 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 own mysteries.

Game Interactions

A list of characters that Mizuki interacts with in the game.

Kanade (icon).pngMafuyu (icon).pngEna (icon).pngMiku 25 (icon).pngRin (icon).pngMeiko (icon).pngAn (icon).pngTsukasa (icon).pngAkito (icon).pngTouya (icon).pngKohane (icon).pngNene (icon).pngRui (icon).pngAiri (icon).pngShizuku (icon).png


Yoisaki Kanade: Fellow circle member. Mizuki is grateful towards Kanade for accepting them as they are.

Asahina Mafuyu: Fellow circle member. Mizuki thinks she appears to be nice, but isn't sure.

Shinonome Ena: Fellow circle member. Mizuki enjoys teasing her.

Shiraishi An: Classmate from 1-A and a close friend.

Kamishiro Rui: "An old friend". They bonded over being outcasts in middle school, hanging out on the roof together. Mizuki is happy to see that Rui's made friends since then. According to Mizuki's second 1* story, Mizuki is the one who made Rui and Nene's stage outfits after they ran into Rui working on Nenerobo and found it totally uncute.

Kusanagi Nene: "Other old friend". Both became friends by Rui's intervention to help both. According to Mizuki's second 1* story, Mizuki is the one who made Rui and Nene's stage outfits after they ran into Rui working on Nenerobo and found it totally uncute.

Shinonome Akito: Knowing him firstly as Ena's little brother, they call him "little brother-kun", much to his embarrassment.

Azusawa Kohane: Mizuki briefly met Kohane at the Kamiyama High School Cultural Festival.

Aoyagi Touya: They met each other during the School Festival. Mizuki, Touya and Akito all go together to watch Tsukasa perform. Mizuki suggested they all sit in the front row to see the play up close, as Touya agrees with a smile.

Tenma Tsukasa: Mizuki knew of Tsukasa in his play in the School Festival. They thought the play was hilarious. They think Tsukasa is cool, as said in one of their live interactions.


Mizuki is either featured in or has an alternate vocal of the SEKAI versions of the following songs:

Song Name Composer Date Released
Charles balloon 09/30/2020
Otome Kaibou DECO*27 11/01/2020
Hitorinbo Envy koyori 12/14/2020
Bocca della Verità Hiiragi Kirai 3/6/2021

Song Name Composer Date Released
Kuyamu to Kaite Mirai Mafumafu 09/30/2020
Keitai Renwa Mafumafu 11/15/2020
Jackpot Sad Girl syudou 11/20/2020
Infinitely Gray Surii 02/26/2021
ID Smile toa 04/19/2021
Kanade Tomosu Sora Sasanomaly 06/21/2021

Introduction Video


【25時、ナイトコードで。】暁山 瑞希(CV.佐藤 日向)


  • As of current, Mizuki’s gender identity is hidden from the player.
  • When referring to themselves, Mizuki uses the typically masculine first-person pronoun “Boku” (ボク).
  • They have the same height as Haruka, and they are also the tallest member of 25-ji, Nightcord de.

External links