She is the second daughter of the Marui triplets. She has a raging obsession for voluptuous chests. She is so athletic that she is able to leap across lakes, run faster than a motor-scooter and able to smash walls and doors without a lot of effort. However, she is oblivious to embarrassment leading to many hilarious situations, namely with Shin. 

The 11-year-old Marui triplets could not be any more different. The oldest one, Mitsuba, is sadistic and kind of mature for her age. The middle one, Futaba, is perverted and very athletic and has the strength of a full-grown man. The youngest one, Hitoha, is generally very quiet and gentle but when push comes to shove, she might just be the strongest, the most perverted and the most sadistic out of the three.<br><br>
The three are all in the same class, led by the newly graduated teacher Yabe Satoshi. He usually gets pushed around by the girls and, on occasion, abused but the triplets also try to lead him and the new school nurse, the clumsy Kuriyama Aiko, together. However, Yabe had no intention of dating Aiko and the methods the triplets use to accomplish their goal are highly unorthodox...

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Satomi got her start in show business in 2001 when she won the "Idol Grand Prix", an idol contest sponsored by the manga magazine Nakayoshi. She became an event character for the anime "Tokyo Mew Mew" by joining the group Mew Five. She made her debut as a voice actress in 2004 in with role of Anzai Futaba from Koi Kaze, and as a stage actress a year later. She released her first single "Akeban!" in 2011. As a part of the BanG Dream! project, she also played the keyboard for the band [Roselia](https://anilist.co/staff/153170/Roselia) as the character Rinko Shirokane up until September 2018, when she was forced to quit after suffering sudden deafness twice. Before Roselia, she had been playing the piano since a young age, and previously played classical music.

Satomi's hobbies include using computers, drawing, reading, gaming and sleeping. Her favorite food is umeboshi, and she loves animals, especially cats.

(Source: BanG Dream! Wiki, edited)

The 7th DVD/Blu-ray volume of the comedy anime Mitsudomoe will come with a special unaired episode. Retail seller Neowing is now listing it to be released on February 23, 2011.

The somewhat precocious and sadistic girl 'Mitsuba', the somewhat lecherous muscle girl 'Futaba', and the somewhat mysterious girl 'Hitoha'. Better known as the (mischievous) "Marui Sisters", this is the story of how these three triplets go about their days in Class 6-3 with their cute yet wild antics.

A spin-off of Mitsudomoe, this series is comprised of single-page chapters that could not be published along with the original manga. 

Futaba Marui