|Relatives||Blue Knight and Deep Blue|
|V.A. (English)||Scottie Ray|
|V.A. (Japanese)||Megumi Ogata|
Masaya Aoyama is one of Ichigo's classmates as well as her love interest, and is one of the few people outside the Mew project to know her true identity. He is 13 years old (as old as 16 in some dubs) and captain of the school's Kendo team. He has two alter egos: the Blue Knight and Deep Blue.
Masaya doesn't receive as much screen time as the series's main characters, so his personality isn't quite as developed. He is usually portrayed as calm and level-headed, but has moments where he'll lose his cool and get jealous and possessive of Ichigo. Due to the fact that he is an orphan, he is incredibly eager to please others and will put on a front of perfection, doing his best to excel in everything he can. He is described by Ichigo with such terms as "smart" and "very athletic".
Masaya has darkly tanned skin, short black hair, and orange-y brown eyes. He is one of the more effeminate human men with large eyes and a rounded face. He is described as being incredibly attractive by many of the girls at his school. When he's not wearing his uniform, he tends to dress smartly with collared white shirts and black dress pants.
In TMMR, Masaya appears a few times. In the fanfic, he is still dating Ichigo, but is concerned about her since he hasn't heard from her in a while. He visits Café Mew Mew semi frequently, and gets to know the Replacement Mew Team . He and Ryou begin to frequently communicate, theorizing over their growing suspicions that Ichigo and the others are in danger. When it's revealed that they are, he curses himself for being mostly powerless to help, but continues providing the team with moral support. By the end he is reunited with Ichigo.
- Mew Mew Power - Mark
- Mew Mew Amiche Vincenti (Italian) - Mark Aoyama
- Dong Jing Mao Mao (Mandarin) - Ya-Ye QingShan
- Dung Ging Miu Miu (Cantonese) - Nga-Ya ChingSaan
- Berry Berry Mew Mew (Korean) - Min'u Hahoyama
- טוקיו מיו מיו/Tokyo Mew Mew (Hebrew) - Masaya Aoyama
- Mew Mew Power (French) - Marc Gautier
- Mew Mew Power (Season 1 Portugal) - Mark
- Tokyo Mew Mew (Season 2 Portugal) - Mark Aoyama
- Mew Mew Power (Danish) - Masaya Aoyama