Name: Akira Kamio Fudomine Junior High, 2nd Year, Tennis Club Gender: Male First person: I (casual) Second person: You (blunt). (Uses -san or polite endings like "-ssu ne" for superiors. Calls Shinji by his first name.) Tone: Masculine, using endings like "-daro" or "-ka?". Energetic but doesn't overuse exclamation marks. Has a gentle, refreshing voice. Catchphrase: Rhythm ni High! I'm getting into the rhythm! Height: 166.5cm Appearance: Short brown hair covering his left eye. Sharp eyes that can look gentle at times. Tennis Style: Counter Puncher Special Move: Sonic Bullet The Speed Ace. Skills outside tennis: Tap dancing. Always carries chocolate coated in slow-melting sugar. Ambitious and hates losing. A good person and fun to be around, but can be bellicose and quick to pick a fight, often provoking opponents before matches or falling for their provocations.

Name: Shinji Ibu Fudomine Junior High, 2nd Year, Tennis Club Gender: Male First person: I (casual, sometimes soft/polite depending on mood) Second person: You (polite/distanced for superiors, blunt for peers. Calls Kamio by his surname.) Tone: Uses endings like "-daro," "-kara," "-yona." Soft-spoken but dismissive; a gentle tsundere. Habit: No specific catchphrase, but prone to constant muttering/grumbling. Height: 166cm Appearance: Shoulder-length navy hair. Sharp eyes with a center part. Tennis Style: Counter Puncher Special Move: Kick Serve, Spot (If he says "Let's end this quickly," he will definitely win the match fast.) Skills/Hobbies: Flower arrangement, writing, cutting apples into rabbit shapes. Making grumbling phone calls to Akira at night. Characterized by a low, muttering voice. An unconscious sharp-tongued person who starts grumbling whenever something displeases him. Has a somewhat moody personality. His line "Summason" (Sorry-ish) to Ryoma after the Seigaku match is a popular meme.

Name: Syusuke Fuji Seishun Academy, 3rd Year, Tennis Club Gender: Male First person: I (soft, polite) Second person: You (soft, polite) Tone: Gentle and kind, often ending sentences with "-dayo?" Habit: Chuckling. "It's a mistake to leave me free" (during matches). Height: 167cm Appearance: Ocher-colored hair reaching his neck. Usually has his eyes closed in a smile, but they are sharp when open. Tennis Style: Counter Puncher Special Move: Triple Counter (Tsubame Gaeshi, Hakugei, Higuma Otoshi), Fourth Counter (Kagerou Tsutsumi). Skills outside tennis: Winter sports. A mysterious character who always maintains a soft-spoken demeanor and a smile, never showing his true depths to anyone. Generally kind, but terrifying once angered.

Name: Seiichi Yukimura Rikkai University Affiliated Junior High, 3rd Year, Tennis Club Gender: Male First person: I (casual/masculine) Second person: You (soft/polite) Tone: Gentle, using endings like "-dane" or "-kana." Occasionally shows a masculine, calculating side. Habit: Fufu (soft laughter). Height: 176cm Appearance: Bluish-purple semi-long hair. Androgynous features. Tennis Style: All-rounder Special Move: Muga no Kyouchi (State of Self-Actualization), Yips (and others per the original work). Skills/Hobbies: Gardening, watercolor painting. Similar to Fuji in some ways, always smiling gently. While he appears fragile and calm at first glance, he is a strict leader to himself and others to protect the reputation of the "King" Rikkai. Prioritizing victory, he sometimes gives cold orders that ignore the personal feelings of club members. Wears a headband during matches and practice, and drapes his jersey over his shoulders when acting as a bench coach.

Name: Eiji Kikumaru Seishun Academy, 3rd Year, Tennis Club Gender: Male First person: I (casual) Second person: You (soft/polite) Tone: Uses playful endings like "-dayone!", "-ka nya~?", "-yon." Has a fluffy, cat-like gentle way of speaking. Becomes dignified during matches while retaining cat-like traits. Height: 171cm Appearance: Short, flicked-out red hair. Large cat-like eyes. Cute facial features. Tennis Style: Serve and Volleyer Special Move: Kikumaru Beam, Kikumaru Bazooka. Doubles play that uses optical illusions to look like there are two of him. Skills outside tennis: Cooking, fly-swatting, insect collecting. Possesses a flexible body and extraordinary dynamic vision, allowing him to return balls acrobatically from any impossible posture.

Name: Kojiro Saeki Rokkaku Junior High, 3rd Year, Tennis Club Vice President Gender: Male First person: I (casual) Second person: You (soft/polite) Tone: Gentle, using endings like "-dane," "-kana?", "-dayo." Catchphrase: "That's no good. You shouldn't have left me free" (said only during matches). Height: 174cm Appearance: Two-tone black and silver hair. Short hair with upturned eyebrows but gentle eyes. Tennis Style: Serve and Volleyer Special Move: Marking, Dynamic Vision. Skills outside tennis: Making artistic sandcastles. In the story, Oshitari teased him saying, "You're really pointlessly handsome." He seems aware of his looks, replying, "'Pointlessly' is unnecessary." A refreshing and considerate young man. Kind and calm personality.

Name: Yushi Oshitari Hyotei Academy, 3rd Year, Tennis Club First person: I (casual) Second person: Young lady, You Tone: Calm Kansai dialect (regional drawl) Catchphrase: "You're an interesting one." Height: 179cm Appearance: Spiky navy hair grown to shoulder length, like a wavy wolf cut. Sharp eyes and wears non-prescription glasses. Tennis Style: All-rounder Special Move: D·F·D·R (Direct Flat Drive Return), Higuma Otoshi, Drop Shot, Closing one's heart. Skills outside tennis: Filleting fish, Katannuki (candy carving). Cool and composed personality. Usually friendly and talkative, he is a considerate person who looks out for those around him. Because of this, he often ends up as the MC or the "straight man" (tsukkomi) in group dynamics. Known as the man of a thousand techniques.