Ace of Diamond Test

The Ace of Diamond Test is inspired by psychometric methodology and based on research into the characters of the anime series. The test provides feedback such as the following:

Sawamura Eijun

Sawamura Eijun is an impulsive, big-hearted pitcher who relies on relentless optimism and a stubborn work ethic to overcome his lack of natural polish. He is a loud, expressive teammate who rallies others during crises, yet he frequently uses his high volume and humor to mask deep-seated insecurities and self-doubt. He directly challenges authority when he feels the group spirit is threatened, choosing emotional confrontation over quiet compliance. Though he struggles with visible nerves and performance anxiety, he openly leans on mentors and peers for support. He is motivated by loyalty and a desire to be needed rather than personal fame.

Kominato Haruichi

Kominato Haruichi is a quiet second baseman and contact-hitting prodigy who constantly wrestles with the pressure of matching his older brother's legacy. He hides his eyes behind long bangs and speaks softly, acting as a calm observer to louder teammates. Beneath this gentle and self-effacing exterior lies a fierce, understated ambition and pinpoint technical skill that allows him to place the ball anywhere on the field. He avoids drama and prefers to demonstrate his value through precise execution rather than talking. He is motivated by quiet mastery and deep loyalty, finding absolute focus under pressure when everything else falls away.

Miyuki Kazuya

Miyuki Kazuya is a brilliant baseball catcher and strategic mastermind who orchestrates games with ruthless intelligence. He is known for his cheeky, sarcastic demeanor and his habit of using psychological jabs to needle both opponents and teammates. Despite his prickly exterior, he holds a deeply selfless commitment to his pitchers, willingly playing the villain and making himself hated if it helps them improve. He struggles to show vulnerability, hiding his physical pain and personal anxieties behind an aura of absolute competence. He is a highly logical planner who thrives under pressure, preferring to shoulder heavy burdens alone rather than trust others with his weaknesses.

Mei Narumiya

Mei Narumiya is the flamboyant rival ace of Inashiro Industrial who balances unmatched left-handed pitching talent with a demanding, childlike attitude. He craves the spotlight and openly expects his teammates to accommodate his whims, yet he secretly backs up his massive ego with grueling training sessions. He reacts to failure with dramatic tears, using setbacks as fuel to aggressively reinvent his game and maintain his dominance. He expresses his competitive drive by verbally needling his rivals and challenging batters head-on. His growth lies in moving past lone-wolf pride to trust his team, making him a charismatic but exhausting leader.

Takigawa Chris Yū

Takigawa Chris Yū is a brilliant third-year catcher who serves as a strategist and mentor after a severe shoulder injury halts his playing career. Once the most promising player of his generation, he is forced to watch from the sidelines, channeling his grief and lingering bitterness into helping others succeed. He is highly analytical and demanding, insisting on strict physical conditioning and basic fundamentals before allowing flashy play. Though his quiet, detached exterior can make him seem cold or unapproachable to younger players, his guidance is deeply selfless. He finds a renewed sense of purpose by quietly rebuilding the confidence and technique of struggling pitchers.

Kuramochi Youichi

Kuramochi Youichi is the lightning-fast shortstop and vice-captain of Seidou High who hides a deeply caring nature behind a loud, aggressive exterior. He uses his incredible speed and sharp reflexes to terrorize opposing defenses, yet he struggles to express his loyalty to his teammates without resorting to roughhousing and playful bullying. Having channeled a troubled, rebellious youth into disciplined athletic drive, he acts as a fierce, protective older brother to his younger peers. He shows his affection through strict discipline and loud demands rather than gentle words. He is a reliable, high-energy teammate who demands excellence from others because he gives nothing less himself.

Furuya Satoru

Furuya Satoru is a quiet prodigy whose overwhelming natural talent as a right-handed pitcher makes him a national sensation but isolates him from his peers. He seeks the thrill of throwing to catchers who can handle his raw power, yet his single-minded competitiveness often leads him to push past his physical limits rather than communicate his exhaustion. Beneath his sleepy-eyed, aloof exterior lies an intensely self-critical competitor who measures his entire worth by his performance on the mound. He struggles with poor pacing and inconsistent control, forcing him to learn that raw ability cannot replace teamwork and emotional resilience.

Yuuki Tetsuya

Yuuki Tetsuya is a disciplined first baseman and former team captain who leads entirely by personal performance rather than vocal commands. Once an overlooked player with little natural talent, he built himself into a formidable power hitter through relentless, quiet practice. He maintains an iron composure in high-stakes situations, absorbing immense pressure without outward panic or emotional outbursts. Although he appears stoic and unshakeable, he carries a deep, almost paternal sense of responsibility for his teammates and quietly worries about their future. He shows absolute trust in his successors, stepping back to let them lead while remaining their silent, supportive backbone.