Hagiwara Mai is a member of the Hello! Project group °C-ute.

Nickname: Maimai, Hagitty, Mai-chan
Birthplace: Saitama, Japan
Bloodtype: AB
Height: 152cm (4'11.8")
Favorite Color: Pink, light blue, orange
Favorite Food: Strawberries, curry rice
Least Favorite Food: Melon, watermelon, green bell peppers
Specialty: Riding a unicycle
Favorite Flower: Lavender
Dislikes: Cleaning, studying
Scared of: Cats, ghosts
Favorite Movie: "Harry Potter," "Jurassic Park"
Favorite Book: "Nezumi-kun no Chokki"
Favorite Word: Daisuki (I love you/it)
Favorite Season: Summer
Favorite Song: Genki Jirushi no Oomori Song (Minimoni)
Charm Point: Squishy cheeks
Hello! Project Audition Song: Te wo Nigitte Arukitai
Hello! Project Groups: Hello! Project Kids, 4KIDS (2002), °C-ute (2005--), Kira☆Pika (2007)

Hagiwara Mai joined Hello! Project as one of the fifteen Hello! Project Kids. She made her debut as one of the 4KIDS featured in the Minimoni ja Movie Okashi na Daibouken! film, as well as on Minimoni's 6th single, "Genki Jirushi no Oomori Song".

Hagiwara was one of the seven Hello! Project Kids who weren't placed in Berryz Koubou. In 2005, those seven members would form °C-ute.