|Seidou High School No. 12|
|Bats: Right||Throws: Right|
|Age||16 (debut) |
|Date of birth||3 September|
|Height||177 cm (5' 9.5")|
|Weight||69 kg (152 lbs)|
|Education||2nd Year High School (debut)
3rd Year High School (current)
|Voice Actor||Suzuki Yuto|
Tsuyuzaki Wataru (Act II)
|“||The only way to get used to something like this is through the sheer number of pitches caught.||”|
— Ono to Yui
Ono is a big teenager with short-cropped brown hair. He has a round shaped face, brown eyes and a big nose.
He is a considerate boy, always thinking about how the other party could feel. If he sees potential in someone he is rather strict with them and doesn't mind giving advice to his teammates. He is also very knowledgeable about baseball.
Ono belongs to Miyuki's generation which made him a third choice after Miyauchi that is why he remained in the second string all throughout the summer tournament. At the start of the fall, he became one of the reserve catchers of the first string.
At Jingu Tournament, he became the starting catcher following Miyuki's three-week rehabilitation from an injury he sustained against Ogawa Tsunematsu.
Ono's defining feature as a catcher is his concern and meticulous consideration towards the pitchers. Although he had prior trouble catching Sawamura and Furuya's pitching, Ono still managed to put up with them. Ono is well versed in the catcher's job such as guarding the runners on base.
As catcher he likes to play safe and improve the pitchers' control over the ball. Understanding the burden on every pitcher's arm, Ono usually doesn't want to put all the pressure on them.
Along with Kariba Wataru, Ono trained the most with Sawamura after Chris retired. He soon became well-versed with all the pitchers' pitching style making Miyuki and coach Kataoka trust him to handle them as the back stopper.
- "No good at all if someone like me could catch that easily." - to Sawamura "That was disturbingly self-depricating, Ono..." - Chris 
- "The only way to get used to something like this is through the sheer number of pitches caught." - to Yui 
- "Our pitchers throw very particular stuff." - to Yui 
|Seidou High School|
|Miyuki Kazuya • Maezono Kenta • Kuramochi Yōichi • Kawakami Norifumi • Asou Takeru • Nakata Ataru • Ono Hiroshi • Higasa Shōji • Seki Naomichi • Yamaguchi Ken • Kijima Rei • Kawashima Kengo • Shirasu Kenjirō • Mimura Ryōta • Watanabe Hisashi|
|Sawamura Eijun• Furuya Satoru • Kominato Haruichi• Kanemaru Shinji • Tōjō Hideaki • Kaneda Tadahiro|
|Yui Kaoru• Yūki Masashi • Okumura Kōshū• Mogami Takeshi • Asada Hirofumi • Seto Takuma • Kuki Yōhei
|Former players||Yūki Tetsuya • Tanba Kōichirō• Kominato Ryōsuke• Masuko Tōru• Isashiki Jun • Miyauchi Keisuke • Sakai Ichirō • Kadota Masaaki • Kusunoki Fumiya • Takigawa Chris Yū • Azuma Kiyokuni
|Managers||Fujiwara Takako • Umemoto Sachiko• Natsukawa Yui• Yoshikawa Haruno
|Staff||Kataoka Tesshin • Ochiai Hiromitsu • Takashima Rei • Kazuyoshi Oota|