Willem (2nd voice), a forward for the Netherlands national team in the *Captain Tsubasa* franchise, emerges as a pivotal figure during international tournaments. Renowned for his clashes against Japan, he engages in fierce on-field rivalries with Japanese striker Kojiro Hyuga, their confrontations escalating into heated personal disputes amid critical matches. As a key player for Italian club FC Piemonte, Willem faces Hyuga again in high-stakes league battles, where tactical ingenuity and physical intensity define their encounters. Their rivalry spills into verbal clashes and relentless duels, amplifying the adversarial dynamic across both national and club competitions. Later narrative arcs place Willem in epilogue sequences, signaling his enduring prominence in professional football post-tournament. The sources chronicle his competitive engagements but omit exploration of his early career, personal history, or expansions into spin-offs, movies, or OVAs beyond his established appearances.