Ryou Shirogane is a character who appears in both the anime and manga series. He is one of the main protagonists of Tokyo Mew Mew and is Keiichiro's partner for the Mew Project.


Ryou is a genius. In episode 36, his father mentions that his IQ was over 180 at age of 10. He is headstrong, stubborn, rude, sarcastic, and occasionally reclusive. He teases Ichigo Momomiya a lot, but he has saved her on many occasions when she has transformed into her cat form. Also, he encourages Retasu Midorikawa to be more confident.



Ryou has tan skin and blond hair. He is tall and has aqua blue eyes, and is 15-years-old. When he's Alto, his eyes remain the same color. Ryou's Mew mark is on the side of his neck, which is always covered with the collars of his clothes.

Tokyo Mew Mew

Ryou's childhood

When Ryou was 10, a Chimera Anima attacked his parents's mansion and killed them when he was out with Keiichiro. He tried to fight the Chimera Anima but Keiichiro held him back. He moved to America with Keiichiro and spent the rest of his childhood there, but then returned to Tokyo to perfect his father's work.

Ryou Shirogane's parents.

Tokyo Mew Mew a la Mode

After her first day of school, Berry Shirayuki almost falls down a set of stairs, but was saved by Ryou, who caught her. He then invites her to the Café Mew Mew and she accepts, then goes there to admire the treats that were being displayed.

Later, Ryou catches Berry by surprise and she falls into a pastry display. She runs away, and goes through a DNA infusion machine, which merges her DNA with that of two endangered animals: The Amami Black Rabbit and the Andes Mountain Cat. She passes out and when she wakes up, Ryou gives her a robot named R2003, which she nicknames Ucha.

The Mew Project

Ryou is dedicated to the Mew Project. When Dr. Shirogane's (Ryou's father) project was ready, Ryou was unsure that it would be safe, so he tested it on himself. He didn't have the right genes, so he didn't turn into a proper Mew Mew, but does have the ability to change into a cat for ten minutes. If he stays a cat for longer than that, he is permanently stuck in cat form.

When he is a gray cat, he goes by the name Alto. He wears a green scarf around his neck. Alto was introduced in episode 28. Alto saved Ichigo's life many times and has kissed her in order to return her back into human form. Ryou is the one who gave the girls their Mew Pendants so that they could transform. He was also the one who (with Keiichiro) chose which people would get the Red Data Animal DNA implanted in them.

Love Life

  • Ichigo Momomiya: Ryou seems to have a crush on Ichigo, and has kissed her many times to change her back from a cat into a human, though he is rude and demanding to Ichigo. He often likes to tease her.
  • Retasu Midorikawa: Retasu used Mew Aqua to transform herself into a half-porpoise and kissed Ryou, but her feelings were one-sided so they decided to be just friends.


Name Changes (Manga)

Ryou keeps his name in all English manga translations. However, his first name is spelled slightly different in each one.

Language Title Publisher Name
Japanese Tokyo Mew Mew Kodansha Ryou Shirogane
English Tokyo Mew Mew TokyoPop & Kodansha Ryou Shirogane (TokyoPop)
Ryô Shirogane (Kodansha)
English (Singapore) Tokyo Mew Mew Chuang Yi Ryo Shirogane

Name Changes (Anime)

While most dubs either choose to use Ryou's Japanese name or 4Kids English name, some dubs have come up with their own, unique names for him.

Language Title Name Voice Actor / Actress
Japanese Tokyo Mew Mew Ryou Shirogane Kouichi Toochika
Junko Minagawa (Age 10, Ep. 36)
English Mew Mew Power Elliot Grant Sean Schemmel
Mandarin Dōng Jīng Māo Māo
(Tokyo Cats / Tokyo Mew Mew)
Léng BáiJīn Liú Jié
Cantonese (TVB Dub) Dung Ging Miu Miu
(Tokyo Mew Mew)
Ling BaakGam Ng Bok-Man (Raymond Ng)
Cantonese (ATV Dub) Maau Maau Jin Deui (Cat Team / Mew Mew Team) Ling BaakGam Ho Wai-Sing (Alex Ho)
Italian Mew Mew Amiche Vincenti
(Mew Mew Winning Friends)
Ryan Shirogane Davide Garbolino
Korean Berry Berry Mew Mew Jae-hee Gang Il Kim
Hebrew Tokyo Mew Mew Rayou Shirogane Daniel Zilberstein (Season 1)
Dor Sarugo (Season 2)
Brazilian Portuguese As Super Gatinhas
(The Super Kittens)
Elliot Grant Thiago Longo
Portuguese (Season 1) Mew Mew Power Elliot Grant Mário Centelo
Portuguese (Season 2) Tokyo Mew Mew Ryan Shirogane Quimbé
Danish Mew Mew Power Ryou Shirogane Simon Stenspil
Thai Tokyo Mew Mew Ryou Shirogane N/A
Albanian (Albania Production) Vajzat Mjau - Mbrojtëset e Planetit
(Mew Girls - Defenders of the Planet)
Eliot Grant Roland Saro
Albanian ("Jess" Discographic) Luftëtaret Mace
(Cat Warriors)
Ryan Shirogame Jorke Broka
Hungarian Vadmacska Kommandó
(Wildcat Commando)
Elliot Grant Károly Moser
Latino Spanish Miau Miau Power
(Mew Mew Power)
Elliot Grant Wolfang Galindo
French Mew Mew Power Elliot Grant Christophe Hespel
Dutch Mew Mew Power Elliot Grant N/A
Serbian Družina Mjau - Mjau / Miau - Mjau Tokio
(Mew Mew Team / Tokyo Mew Mew Team)
Elliot Grant Nebojša Milovanović
Croatian Mijau Mijau Družina
(Mew Mew Team)
Elliot Grant N/A
Bulgarian Силата Миу Миу / Silata Mew Mew
(Mew Mew Power)
Elliot Grant N/A
Greek Mew Mew Power Elliot Grant Stamatis Gardelis
Turkish Mew Mew Power / Sihirli Kızlar
(Magical Girls)
Elliot Grant N/A



  • The different meanings for Ryou's first and last names have a lot to do with wealth. "Ryou" can mean "angle", "edge", "corner", "power", "majesty", "dragon" and "spirit", and his last name, "Shiro" can mean "white", "gane", (money, or gold) and "platinum".
Community content is available under CC-BY-SA unless otherwise noted.