TV-Series
Description
Jusaburo Mori, also known as Mouri Jusaburou, stands 191.63 cm tall, sporting short curly red hair and brown eyes. His naturally cheery and upbeat demeanor contrasts with his frequent skipping of tennis practice; he openly admits he trains only when motivation strikes. This casual attitude initially bred resentment among his Rikkai juniors—Yukimura Seiichi, Sanada Genichirou, and Yanagi Renji—who saw it as squandering his talent.

Born January 3rd in Hyogo Prefecture, his family moved to Osaka before his ninth birthday. He first attended Shitenhouji Middle School, befriending Hara Tetsuya at a comedy festival, but transferred to Rikkai before August of his first year. Though securing a regular spot on Rikkai's tennis team, his habit of avoiding practice left Yanagi with scant performance data. At the Nationals before high school, he delivered a decisive victory over Shitenhouji's Oshitari Kenya without conceding a single game. Enrolling at Rikkai High School brought special treatment for his gifted status, yet practice absences persisted.

A turning point arrived during Yukimura's hospitalization. Following a crushing 0–6 loss to Hyotei's Ochi Tsukimitsu in the Kantou Singles Tournament, Mori sustained an injury. Seeking treatment at Yukimura's hospital, he contemplated quitting tennis altogether. Witnessing Yukimura's fierce rehabilitation sparked deep self-reflection. Mori committed to rigorous daily training. He secretly began leaving cold Pocari Sweat sports drinks at Yukimura's bedside after rehab sessions. This anonymous gesture earned him the nickname "Sports Drink Fairy" from Yukimura, who never learned his identity.

His renewed dedication culminated in winning a newcomers' tournament without dropping a set, securing an invitation to Japan's U-17 Selection Camp. He climbed to No. 20 in the camp rankings. Coaches paired him with Ochi specifically to curb his absenteeism. Initially terrified of Ochi due to their past match and Ochi's stoic demeanor, their partnership faltered badly, causing Ochi's rank to plummet from No. 4 to No. 17. Criticized by Taira Yoshiyuki, Mori vowed to restore Ochi's standing, pledging to elevate him back into the Genius 10. This commitment forged their partnership, with Mori affectionately dubbing Ochi "Tsuki-san."

As the camp's No. 10 representative, Mori partnered with Ochi against middle schoolers Atobe Keigo and Niou Masaharu in a challenge match. During this encounter, Mori displayed tactical skill by countering Niou's illusion-based "Zero Shiki Serve." Though they lost the grueling three-set battle, rule changes later allowed middle schoolers onto the team, enabling Mori and Ochi to reclaim their spots as Nos. 9 and 10 representatives for the U-17 World Cup.

At the World Cup, Mori's unique joint-dislocation ability surfaced comically when he collapsed after eating Mitsuya Akuto's "Akuto Meshi." During the quarterfinals against France, he partnered with Yanagi for Doubles 1 against Edgard Delacroix and Jonathan St. Georges. Initial discord arose from Yanagi's lingering resentment, but reconciliation occurred when Yanagi recognized the sports drink symbolizing Mori's past encouragement of Yukimura. Mori then strategically slept during the match to enhance Yanagi's data collection, though they lost the first set.

Mori employs an all-rounder playstyle, utilizing unconventional techniques like voluntary joint dislocation for defensive maneuvers or accessing confined spaces. His partnership with Ochi evolves into one of deep mutual reliance, marked by shared setbacks and comebacks. Despite his earlier aloofness, his actions consistently reveal care for his juniors, particularly through his anonymous support of Yukimura.