Nagisa Hazuki is a student at Iwatobi High School and a key member of the Iwatobi Swim Club. He first appears as a first-year student who admires Haruka Nanase’s swimming so much that he chooses to attend Iwatobi High School specifically to be near him. His enthusiasm for swimming and his straightforward attitude play a central role in reviving the school’s swim team after it had been inactive for some time.

In terms of personality, Nagisa is cheerful, energetic, and notably straightforward. He often speaks his mind without hesitation, though he never intends harm with his bluntness. He loves making jokes and bringing a lighthearted energy to the group, frequently brightening the atmosphere among his teammates. Despite his playful nature, he is genuinely caring toward others. He is also bold and opinionated, and his actions tend to come before his words. His innocent and bubbly demeanor makes him approachable, but he can also be quite pushy when he sets his mind on something, particularly when he wants to convince Haruka to participate or take action.

Nagisa’s primary motivation is his admiration for Haruka’s swimming and his desire to swim alongside his friends. This admiration drives much of his enthusiasm for the sport. He values friendship and teamwork above all, and his love for the team dynamic is a consistent force in his actions. He is driven by a simple but strong wish to have fun and compete together with the people he cares about.

Within the story of Free! The Movie -Timeless Medley- the Bond, Nagisa is part of the Iwatobi team as they prepare for upcoming tournaments following Haruka’s reconciliation with Rin Matsuoka. He supports his teammates with his characteristic energy and helps maintain the group’s morale during moments of uncertainty. His role is that of a catalyst for fun and togetherness, ensuring that the team stays bonded even when individual members face personal struggles about their futures.

Nagisa shares strong relationships with each of his teammates. He looks up to Haruka as a mentor and idol, and his admiration for Haruka’s swimming is the foundation of his own commitment to the sport. He relies on Makoto Tachibana for guidance, especially when conflicts arise with Haruka. With Rei Ryugazaki, Nagisa has a playful dynamic, often coaxing and encouraging him during training and daily activities. This relationship highlights Nagisa’s ability to bring out the best in others through his cheerful persistence. His bonds with all the swim club members are central to his character.

In terms of development, Nagisa remains consistently positive and supportive throughout the film. While he does not undergo a dramatic personal transformation in this movie, his presence reinforces the theme of friendship and the importance of maintaining strong team bonds. His growth is less about overcoming a personal flaw and more about continuing to be the emotional anchor and source of joy for the group, even as the older members face pressure about their futures after graduation.

Regarding notable abilities, Nagisa is a breaststroke swimmer. He is recognized for his speed and agility in the water, and his well-developed calf muscles, particularly his soleus muscles, are noted as a physical asset to his swimming technique. His swimming style is efficient, and his natural talent, combined with his enthusiasm, makes him a valuable member of the relay team.

Physically, Nagisa is of average build with wavy, honey-blond hair and magenta eyes. His overall appearance matches his lively personality, with a youthful and energetic look.