Yūto Sakaeguchi (栄口 勇人)

Sakaeguchi is a very friendly person, who often tries to set Mihashi at ease. When Abe and Mihashi have trouble understanding each other (due to Abe's short temper and loud manner of speaking, and Mihashi's stammering and nervousness) Sakaeguchi generally attempts to mediate, being able to understand both of their mannerisms. He attended the same middle school as Abe, and they both played in the Seniors league, although they weren't friendly at this time as they were in different classes and on different baseball teams. Under stress, Sakaeguchi is known to get diarrhea, a trait revealed to everyone by Abe, who noticed it during their high school entrance exams. As a batter, Sakaeguchi is exceptionally good at bunting and usually bats in the leadoff position.

Detail Info
Class: Year 1 Class 1
Family: Father, older sister, younger brother. Mother is deceased.
Position: Second baseman, and vice captain
Throws/Bats: Right/Right
Uniform number: 4
D.O.B: June 8
Blood type: O
Height: 169cm
Weight: 54kg
Voiced by: Chihiro Suzuki

Azusa Hanai (花井 梓)

Though he was the clean up hitter during middle school, Hanai now bats fifth at Nishiura. He is a very level-headed and relatively smart and observant person. He is reliable, knows his own abilities, willing to help when needed, but also is not afraid to talk back to Momoe-san, all of which are qualities that got him unanimously voted to become team captain. At first he tries to compete with Tajima, but eventually acknowledges the fact that Tajima is a better batter.

Detail Info
Class: Year 1 Class 7
Family: Parents, two younger sisters (twins)
Position: Captain, right fielder and pitcher
Throws/Bats: Right/Right
Uniform number: 9
D.O.B: April 28
Blood type: A
Height: 181cm
Weight: 67kg
Voiced by: Kishō Taniyama

Yūichirō Tajima (田島 悠一郎)

Tajima is a clean up hitter and a baseball prodigy, however because of his small build he is unable to hit home runs. He is a naturally out going person and can thus make up for Mihashi's shy nature. Mihashi and Tajima have been shown to get along well as they share their love of baseball and bad school grades. During middle school, his great-grandfather had to go to the hospital, but because no one informed him, he had spent the night at home alone, worrying, while the rest of his family had been at the hospital and then went out to eat dinner, completely forgetting about him. Thus, Tajima decided to attend Nishiura because it is very close to his home (5 minutes away), so if his great-grandfather or his grandparents ever go to the hospital, he would know immediately and not be left behind again.

Detail Info
Class: Year 1 Class 9
Family: Great grandfather, grandparents, parents, two older brothers, two older sisters, sister-in-law, dog, cat, and hamster
Position: Third baseman, catcher and first baseman
D.O.B: October 16
Uniform number: 5
Throws/Bats: Right/Left
Blood type: B
Height: 164cm
Weight: 53kg
Voiced by: Hiro Shimono

Takaya Abe (阿部 隆也)

Abe is the teams catcher, and also one of their better batters. His skills as a catcher were developed during middle school, when he played in the Seniors league. Abe was paired with a talented pitcher named Haruna, whose pitches were so hard and lacking in control that he was constantly covered in bruises. However, he persevered, knowing that if he could catch Haruna's pitches, he would gain a place as a regular. Although he succeeded, Abe soon began to resent Haruna, who strictly refused to throw more than 80 pitches per game, even if it meant walking off the field, and never followed Abe's signs. Because of this, Abe initially values Mihashi for his obedience, desire to stay on the mound, and control. However, he comes to appreciate just how much work Mihashi puts in, and is determined to win games using Mihashi's pitching and prove to him that he is a good pitcher.

Abe has a very short temper, particularly with Mihashi, and is noted to have a loud voice, even when laughing, which intimidates not only Mihashi but sometimes his other teammates too. However, when this is pointed out to him, he takes great pains to be more patient with Mihashi and speak more gently. He was charged by Momoe to look after Mihashi, and he takes this very seriously, constantly monitoring Mihashi's practicing, what he is eating, and how much sleep he's getting, causing Izumi to note that he's very bossy. Abe is also a driving force on the field, generally shouting out instructions to his teammates during play, and closely analyzing the opposition. He uses this habit to his advantage as he is very good at predicting which of Mihashi's pitches will cause a batter to strike out.

Detail Info
Class: Year 1 Class 7
Family: father, mother and younger brother
Position: Catcher,and vice captain
Throws/Bats: Right/Right
Uniform number: 2
D.O.B: December 11
Blood type: O
Height: 170cm
Weight: 55kg
Voiced by: Yūichi Nakamura

Shintarō Nishihiro (西広 辰太郎)

Not quite a regular on the team, Nishihiro is often seen sitting in the benches cheering his team on. He is supposedly one of the smartest first years at school because he never has to study for tests. He appears to have a close relationship with his younger sister, as he is seen playing with her when at home.

Detail Info
Class: Year 1 Class 3
Family: Grandfather, Grandmother, Father, Mother and a younger sister
Position: Outfielder.
Throws/Bats: Right/right
Uniform number: 10
D.O.B: February 10
Blood type: O
Height: 170cm
Weight: 60kg
Voiced by: Ryōhei Kimura

Fumiki Mizutani (水谷 文貴)

Mizutani does not seem to be as skilled at baseball as some of the other members of the team, being further up in the batting order, and occasionally fumbles catches. He appears to enjoy listening to music, as he is almost always seen with headphones on outside of practice.

Detail Info
Class: Year 1 Class 7
Family: Parents, older sister
Position: Left fielder and second baseman
Throws/Bats: Right/Right
Uniform number: 7
D.O.B: January 4
Blood type: B
Height: 172cm
Weight: 57kg
Voiced by: Kenichirō Sumi

Ren Mihashi (三橋 廉)

Mihashi, the main character of the series, is a nervous boy with no self confidence. He is shown to have always had this personality, (which seems to come in part from his father, who displays some of the same mannerisms) however, it became much more pronounced in middle school, where he was bullied by his teammates on the baseball team after gaining a place on the team apparently through favouritism, as his grandfather owned the school. The other members of the team were resentful of this and felt that their reserve pitcher, Kanou, was far more talented than Mihashi. However, Mihashi refused to give up the mound and pitched in every one of their games, even when his teammates stopped trying and the catcher wouldn't give him signs to throw. Eventually, Mihashi decided to change schools for high school and succeeded in gaining a place in Nishiura. Although he felt guilty for ruining his junior high teams enjoyment of the game, and thus promised himself he wouldn't play baseball in high school, Mihashi let slip that he was a pitcher, and is thus dragged into the baseball club, who had no other pitcher.

Although Mihashi is convinced that he has no talent, he has been practicing hard at pitching since elementary school, and his new teammates, in particular the talented catcher, Abe, are astounded at his highly accurate aim. When pitching, he divides his target into nine sections, which is said to be above the level of a professional pitcher, who would divide it into four. Mihashi also has four breaking balls, including unusual fastball which often confuses opposing batters. His pitches are said to be quite slow, although with training from Momoe his speed increases later on in the series.

Mihashi's relationship with Abe as a battery is often strained, with Abe quick to lose his temper and Mihashi fearful of angering him, however, Mihashi greatly respects Abe and is eternally grateful to him for wanting to be his catcher, noting that if it weren't for Abe's skill at reading the opposing team and calling for the right pitches, Mihashi could never make anyone strike out. Abe, in turn, appreciates how hard Mihashi works on his control and his dedication to pitching for the entire game. With his help, and the encouragement of his new teammates, Mihashi's confidence in his pitching as grown slightly, though he still firmly believes it would be nothing without Abe, to the point that Abe promises not to get sick or injured for their three years of high school, in order to be able to catch all of Mihashi's pitches.

Mihashi gets on well with the rest of his team mates, particularly Tajima, who always seems to understand him even when Mihashi can only stutter a few words. He was childhood friends with Hamada, who he calls 'Hama-chan', and they lived in the same apartment building until Mihashi moved away. He is also close to his cousin Ruri, having lived with her family during middle school, though he dislikes it when she calls him 'Renren', and is also friends with Ruri's neighbour, Kanou, who was his rival for the position of pitcher in middle school. Although he became more formal with Kanou in school, likely out of guilt for not giving up the mound to him, Kanou has always thought that Mihashi was a better pitcher than him. They are now on good terms again, and Mihashi calls Kanou by his childhood nickname, 'Shuu-chan'.

Despite his low self-confidence, Mihashi is very stubborn, refusing to give up the mound even when so exhausted that he starts losing control of his pitches, and becoming upset at the idea of the team needing a reserve pitcher. He is quite guillable, loves to eat, and has a fear of dogs. Mihashi's grades are very poor, and he says he had to work hard in order to get into Nishiura. He loves pitching so much that his mother mentions he's always holding a ball, even in his sleep.

Detail Info
Class: Year 1 Class 9
Position: Pitcher
D.O.B: May 17
Blood type: AB
Height:165cm
Weight: 53kg later in series 50kg
Family: Parents
Voiced by: Tsubasa Yonaga