Mahiru Kōzuki

✒️Edit
Mahiru Kōzuki
Chat
Age: 17
Birthday: March 30
Zodiac: Aries
Gender: Female
Japanese Name: 光月 まひる(こうづき まひる)
Chinese Name: 光月真晝
Korean name: 코즈키 마히루
I this character

🎙️ Anime Voice Actor

Edit
Miku Itou
Miku Itou
Japanese(Anime、Voice Actor)

🎬 Appearing Anime

Edit
Jellyfish Can't Swim in the Night
Jellyfish Can't Swim in the Night
Release date: April 7, 2024

Character Setting

Edit

Mahiru Kōzuki is a high school girl who once worked as a talented illustrator but stopped after a painful event. She tries hard to live a normal life, hiding her special talents, but everything changes when she meets Kano Yamanouchi. Their meeting inspires Mahiru to start drawing again, and she becomes the illustrator for the mysterious artist group JELEE.

Mahiru Kōzuki is an ordinary-looking high school girl who blends in with others at school. She is in her second year at Saitama City Omiyagakuen High School.

Mahiru is very sensitive and easily affected by even small things.

She has a caring heart and likes to support others, but sometimes she gets hurt quickly too.

She tries hard to act like a normal girl, not wanting to stand out.

Birthday: March 30, 2007

She was known as the illustrator "Yoru Umizuki" when she was a child.

After something upsetting happened, Mahiru stopped her illustration activities and chose to lead a regular, unnoticeable life.

She is a skilled artist and handles illustrations for the group JELEE.

Mahiru is also good at cooking and cleaning.

She is the only one in the group who is not directly connected to music or performing.

After entering different high schools, they didn't meet in person for two years, but they sometimes talked online.

Trying to Live Normally

Mahiru wants to be an ordinary high school girl after she stops working as an illustrator.

She tries hard not to stand out and keeps her talents secret from others.

Meeting Kano Yamanouchi

Her life starts to change when she meets Kano Yamanouchi.

Kano helps her to feel confident and proud of her artistic skills again.

Joining JELEE

Mahiru becomes the illustrator for JELEE, a mysterious group led by Kano.

She creates illustrations for their videos and projects.

Even though she is not a musician, she is asked to join a live performance in Episode 6, where she awkwardly plays the triangle and feels very nervous.

Interesting Moments

Mahiru loves sea creatures, especially jellyfish.

She once prepared chocolate egg toys featuring sea animals for a group party and called the jellyfish and octopus the "winning" toys.

She has experience with grown-up things—she calmly booked a hotel during a girls’ get-together, surprising Kano with her confidence.

Online Presence

In the story, Mahiru's illustrator account as "Yoru Umizuki" really exists and posts artwork on Pixiv.

She is also credited for art in "JELEE's Shibuya Aquarium" project.

Mahiru's favorite animal is the jellyfish.

She is known for her unique and creative way of seeing the world.

Despite her shy side, she sometimes shows beginner knowledge about mature experiences.

Mahiru Kōzuki has a special connection to both the real and online worlds, making her a relatable and unique character.

(View edit history)

(Last edited time: March 30, 2026, 8:25 p.m.)

💬 Community Discussion

Talk about this anime with people who actually care.

Source: ()
💬 Reply 🗑 Delete
Anibase.Net
The world's largest anime community, which has already been visited by over 100 million people.

Share

Other Characters

View All
Kiui Watase
Kiui Watase
Gender: FemaleHeight: 145cm
Birthday: April 1
Voice Actor: Miyu Tomita
Kano Yamanouchi
Kano Yamanouchi
Gender: FemaleAge: 17
Birthday: July 4, 2006
Voice Actor: Rie Takahashi
Mei "Kim Anouk" Takanashi
Mei "Kim Anouk" Takanashi
Gender: Female
Birthday: September 13
Voice Actor: Miyuri Shimabukuro
Mero Setō
Mero Setō
Gender: Female
Voice Actor: Miho Okasaki
Akari Suzumura
Akari Suzumura
Gender: Female
Voice Actor: Sally Amaki
Momoko Yanagi
Momoko Yanagi
Gender: Female
Voice Actor: Yukina Shutou
View All