-Born on September 29th, 2000 (Libra)
-163cm tall or 5'3
-Bloodtype O
-Nickname is Omizu (given to her by Maeda Kokoro)
-Call during concerts is "Mizuho!"
-Member color is emerald-green, just like her beloved senior's Sato Masaki's member color.
-Born in Tokyo
-Prior to joining Hello! Project Kenshuusei (24th gen), she was a member of a dance club. Similar to Riko's.
-Her favorite colors are pink and emerald green, her skill is playing the flute, dancing, and making funny faces. Her hobbies are singing, watching H!P videos, and listening to music. Her favorite food is annin tofu, and negi. She's said to put so much negi on her udon that the noodles disappear. Her favorite sport is dance, and her favorite genre is J-pop.
-She has a sister who she calls "Nene"
-She's left-handed, making her the second lefty in Tsubaki.
-Her motto is "Shoshin Wasuru Bekarazu" (Don't forget your first resolution).
-Her favorite Hello! Project song is "Happy Daisakusen".
-She's a big fan of Morning Musume '17's Sato Masaki. Often calling her a "beloved" senior instead of someone she just looks up to. Masaki has acknowledged Mizuho's love for her in a blog before and said she likes Mizuho's singing voice and rhythm.
-She's good friends with Maeda Kokoro, their pairing name is MizuKoko. Because Kokoro is also friends with Mao, she considers Mao to be her rival.
-Her charmpoints are her big ears, and soft earlobes.
-Wants to become Tsubaki's "smart" character. Other members said she is very good at studying and often helps them out with their homework.
-On July 2nd, Ono was announced as a new solo host (called a "navigator") for the radio show Hello! SATOYAMA & SATOUMI Club. She replaces Yajima Maimi, who graduated from Hello! Project and C-ute earlier this year.
-She says she wants to become an idol who makes people smile, not just fans but all people.
-Used to be a child dancer much like Riko.
-Is often compared to ex-Morning Musume member Suzuki Kanon because of her smiley and positive character. She is also the type to quickly turn bad situations into good ones by seeing the positive side.
-She's terrified of rollercoasters, but thinks haunted houses and ghosts are funny.