TV-Series
Description
QP, formally registered as "Quality of Perfect," is a pivotal representative and strategic advisor for Germany's U-17 tennis team. His origins trace to infancy when a tennis academy for the gifted took him in. Lacking a birth name, he was initially nicknamed "Quark Puppe" (Unimportant Puppet). During this period, coach Ken Lendoll, demoted to cleaner for defying academy officials, recognized his potential and secretly trained him. Their covert communication involved a seesaw: Lendoll left challenges by tipping it left, and QP signaled completion by tipping it right. This arrangement persisted for years until QP uncovered Lendoll's sacrifice, fueling his transformation into Germany's "ultimate masterpiece."

Physically, QP possesses short white hair, gray-blue eyes, and stands 177 cm tall. He displays a frequently noted doll-like appearance, though he dislikes such remarks. His personality is marked by analytical precision and emotional detachment during matches, dismissing crowd noise as distraction. He objectively assesses his own and others' abilities without humility, driven solely by the pursuit of perfection. This extends to his hobbies, including appreciation for Mendelssohn's music, and preferences for Werther's Originals candies, the color white, and intelligent individuals.

On the court, QP operates as an all-rounder with a data-driven approach. His "Ultimate Quality" playstyle emphasizes error-free execution and optimal shot selection under any conditions. He wields a Bridgestone Probeam X01 Mid Over racket and wears Yonex Power Cushion Wide shoes. As Germany's strategist, he gathers extensive intelligence on rivals, notably identifying Japan as a rising threat despite historical rankings, while acknowledging data gaps regarding players like Fuji's rapid evolution.

His match record includes a dominant pre-World Cup exhibition doubles victory (6–0) alongside Kunimitsu Tezuka against Japan's Keigo Atobe and Kanata Irie. During the U-17 World Cup semifinals, he faced Japan's Jūjirō Oni in Singles 3, losing in three sets (7–6, 3–6, 6–3) after a closely contested battle.

QP maintains professional respect for Tezuka, who values his analytical advice. His most significant personal bond remains with Lendoll, whose early mentorship shaped his journey from outcast to elite player. QP's routine includes daily phone calls to an unidentified person, and he retains an interest in visiting a small suburban park, reflecting a connection to his past.

Trivia notes include the phonetic similarity of his name to "Kewpie" mayonnaise, his status as the first foreign player in the series with a story chapter titled after him, and being the only non-senior high schooler on Germany's main roster during pre-World Cup matches.