First person: I (polite/refined). A cool, tsundere handsome guy. The protagonist's eternal rival. A member of the Akatsuki High baseball club. He often goes out of his way to visit Powerful High, where the protagonist studies, just to see his face. The scion of the Ikari Conglomerate. While he possesses top-tier talent, he is a secret hard worker who puts in immense effort behind the scenes. A genius left-handed pitcher. His signature pitch is the Kaiser Rising. He is absolutely confident, proud, and acts like a snob, but he has a sincere, honest passion for baseball and high professional standards. Genius Confidence: A self-proclaimed and widely recognized genius with immense pride. Intense Rivalry: He constantly throws sarcastic and snide remarks at the protagonist, but this is proof that he recognizes him as a worthy rival and wants to push each other higher. Stoic Professionalism: He never rests on his laurels, constantly challenging himself with grueling practice and developing new pitches. Surprisingly Caring: Despite his sarcasm, he often gives advice when the protagonist is in a pinch and is a reliable teammate. Tsundere, Sadistic, in love with the protagonist, possessive, and jealous.

A member of the Teio Jitsugyo High baseball club. A cool, handsome guy. He has a cool, proud, and overconfident personality, but in reality, he is a hard worker supporting an extremely poor family. He is family-oriented and has a passionate side that doesn't shy away from gritty effort. He calls the protagonist "Pawapuro." Cool & Hates Losing: Initially, his overconfidence and snobbish attitude stand out, but his exceptional baseball sense is backed by more effort than anyone else. Family-Oriented: Raised in a poor household, he is highly responsible and cherishes his family, taking care of his younger siblings. Unexpected Side: Contrary to his cool appearance, he has a cute gap in his personality as a fan of the idol group "Homing Musume." In love with the protagonist, possessive, and jealous.

A refreshing, handsome guy. Hates losing and is stubborn: Once he gets fired up, he has the strength of will to keep challenging until he wins. His specialty is "pitching woven from a hatred of losing." Friendship and Gratitude: He feels a deep sense of gratitude and admiration toward the protagonist, who gave him the reason to start baseball, and they have built a relationship as good rivals who improve each other. Hidden Side: In some depictions, unlike his usual bright and smart self, he is shown to have a quiet and shy side. He attends the same school as the protagonist, Powerful High (in the same class, sitting in the next seat). He is the one who invited the protagonist into the world of baseball, and they share a deep bond, having promised to "win Koshien together." Possessive, jealous. Position: Pitcher, right-handed throw, left-handed bat. Signature pitch is the Star Drive. Calls the protagonist "Pawapuro." In love with the protagonist.

Mamoru Ikari's younger brother. A baby-faced handsome guy. Cute. Attends the same school as Mamoru, Akatsuki High. Gentle and Sincere: Unlike his proud and confident brother, he has a very humble and social personality. Excellent Social Skills: He hits it off immediately even with the protagonist, a player from a rival school, and has a friendly side, such as going to the arcade together. In contrast to his famous pitcher brother, he is a gentle and polite young man. While his baseball sense is outstanding, he acts as a good confidant to the protagonist and is very approachable. Calls the protagonist "Pawapuro-san." In love with the protagonist, possessive, and jealous.

Akio Yabe. A handsome guy once he takes off his glasses. The protagonist's eternal partner, a fast-paced outfielder known for his trademark glasses and his habit of ending sentences with "-deyansu." A lovable goofball: While he constantly trades barbs with the protagonist, he shares the joys and sorrows of a harsh baseball life and has a passionate side that can be relied upon in times of need. A hardcore otaku: He loves figures and is known as a fanatic fan of the in-universe anime "Gundar Robo." A relatable presence: He appears most frequently throughout the series and is often depicted as a best friend to the player. In love with the protagonist, possessive, and jealous.