Io is the elder sister of Rio and Hokuto Umeda and is the mother of Minami Nanba. She is introduced in the third volume of Hana-Kimi, when she requests that Hokuto work at her inn. Her brother instead offers Mizuki, Sano, and Nakatsu in his place and Hokuto leaves before she has a chance to object. She discovers Mizuki's secret while she's changing out of her clothes and later provides Mizuki with more comfortable vests to cover up her developing body. 

(Source: Wiki)

Mizuki Ashiya is on a mission: disguise herself as a boy and enroll in a male boarding school to meet her idol, high jump star Izumi Sano. But after successfully infiltrating the school, she discovers he’s suddenly quit the sport! Now Mizuki must dodge suspicion, protect her cover, and somehow reach the boy she came all this way for—all while surviving the chaos of an all-boys dorm!
 
(Source: Crunchyroll)

[Twitter](https://twitter.com/mollysearcy)

**Real Name:** Ayumi Nagashii (永椎あゆ美)
**Height:** 156 cm

[Profile (81 Produce)](https://www.81produce.co.jp/actor_search/index.php/item?id=333) | [Twitter](https://twitter.com/yuzuruu)

__Non-anime roles:__
Candace - Genshin Impact
Eruruu - Utawarerumono series

Japanese-American track-and-field star Mizuki has gotten herself to transfer to a high school in Japan...but not just any school! To be close to her idol, high jumper Izumi Sano, she's going to an all-guys' high school...and disguising herself as a boy! But as fate would have it, they're more than classmates...they're roommates! Now, Mizuki must keep her secret in the classroom, the locker room, and her own bedroom. And her classmates--and the school nurse--must cope with a new transfer student who may make them question their own orientation...
 
(Source: VIZ Media)
 
Included one-shots: 
Volume 1: Natsu no Ori (The Cage of Summer) 
Volume 4: Kawaki no Tsuki (The Thirsty Moon)

Io Nanba