Grand Blue characters: ages, heights & birthdays

Youngest

18 (Manga), 20 (Anime)

Chisa Kotegawa

Oldest

18 (Manga), 20 (Anime)

Aina Yoshiwara

Every character at a glance

Character	Age	Height	Birthday	Japanese voice
Chisa Kotegawa	18 (Manga), 20 (Anime)	–	–	Chika Anzai
Iori Kitahara	18 (Manga), 20 (Anime)	–	–	Yuuma Uchida
Kouhei Imamura	18 (Manga), 20 (Anime)	–	–	Ryouhei Kimura
Azusa Hamaoka	–	–	–	Toa Yukinari
Aina Yoshiwara	18 (Manga), 20 (Anime)	–	–	Kana Asumi
Nanaka Kotegawa	–	–	–	Maaya Uchida
Shinji Tokita	–	–	–	Hiroki Yasumoto
Ryuujirou Kotobuki	–	–	–	Katsuyuki Konishi
Shinichirou Yamamoto	–	–	–	Junya Enoki
Kaya Mizuki	–	–	–	Nana Mizuki
Yuu Mitarai	–	–	–	Natsuki Hanae
Rie Oohashi	–	–	–	Saki Yamakita
Hajime Nojima	–	–	–	Takuya Eguchi
Kanako Iida	–	–	–	Yuuko Gibu
Kiyoko Kamio	–	–	–	Yuka Iguchi
Kenta Fujiwara	–	–	–	Robert Waterman
Keiko Suzuki	–	–	–	Ai Kayano
Toshio Kotegawa	–	–	–	Shinji Kawada
Kudou	–	–	–	Jun Fukuyama

Ages and heights as listed on AniList; where a character grows up during the story, height is the latest one listed. Updated 2026-10-31.