TV-Series
Description
Akaya Kirihara holds the title "Junior Ace" as the youngest regular and a second-year student on Rikkaidai Fuzoku Chuu's tennis team. Initially aspiring to become Japan's top player, defeats by the team's "Three Demons" – Yukimura Seiichi, Sanada Genichirō, and Yanagi Renji – during his freshman year ignited his drive to surpass them through intense training. His daily life balances rigorous tennis practice, struggling academically in subjects like English, and leisure pursuits such as visiting arcades or playing fighting games. He maintains a habit of daily milk consumption and uses finger ring weights to strengthen his grip, identified as a weakness.

Kirihara displays a distinct dual nature. Off-court, he exhibits energetic enthusiasm and boyish charm, interacting lightheartedly with teammates like Marui Bunta and Jackal Kuwahara, who treat him like a younger sibling. He proves gullible, often falling for Niō Masaharu's pranks, and harbors a fear of ghosts. On-court, he transforms into an aggressive baseliner capable of prolonged, concentrated play. Under pressure, injury, or provocation, he enters Bloodshot Mode, marked by red eyes, heightened speed and power, and violent shots targeting opponents' bodies. This escalates to Devil Mode under extreme duress, characterized by white hair, dark-red skin, amplified aggression, but diminished stamina and mental control. Early displays of this violence included targeting nationally ranked player Tachibana Kippei and temporarily blinding Fuji Shūsuke during a match.

A pivotal shift occurred at the Junior Select Camp, where Kirihara pledged to abandon injurious play after an incident involving Tachibana's sister, An. This resolve was tested against Kevin Smith, resulting in retirement due to a shoulder injury. Subsequent development led to Angel Mode, a variation of Devil Mode retaining sanity and boosting control, facilitated by his U-17 camp doubles partnership with Shiraishi Kuranosuke. Shiraishi's mentorship stabilized Kirihara's mental state, complementing Yanagi's earlier guidance. Kirihara also unlocked Muga no Kyōchi (State of Self-Actualization) against Fuji, enabling technique replication until physical collapse. During the U-17 World Cup semifinals against Germany, he partnered with Tanegashima Shūji in doubles, contributing to Japan's victory. A comic incident involved him sneaking into the German team's village pre-match, leading to capture and the declaration, "Akaya Kirihara, 14 years old, currently in trouble."

His techniques include the Knuckle Serve, using finger pressure for unusual spin targeting opponents' bodies; the One-Footed Split Step for enhanced court coverage; Focus Explosion, a high-speed focus technique with a 10-second limit; and later, the Tornado Snake, a gyro-spin variant of Kaidō Kaoru's move.

Relationships are central to Kirihara's growth. He respects yet fears Sanada, who disciplines him harshly and grooms him as Rikkai's future captain. Yanagi mentors him, forfeiting their U-17 elimination match to ensure Kirihara's advancement. Shiraishi's supportive partnership further curbed his violent tendencies. Marui and Jackal provide camaraderie, often accompanying him to arcades, while his rivalry with Echizen Ryoma fuels his competitive drive. Rikkai's upperclassmen collectively nurture his development as the team's designated next leader.