Yuzu Hīragi/Relationship

Shūzō Hīragi
Yuzu is shown to get annoyed by her father, and due to his goofy nature, she often smacks him with her paper fan whenever he does something foolish. But as a father and daughter, they care for each other, and Shuzou would support and cheer for Yuzu as she duels, and Yuzu in return promises that she will win.

Yūya Sakaki
Yuzu and Yūya have been childhood friends for a long time and she is grateful for his help over the years. Among Yūya's other friends, she is the one who is seen hanging around with Yūya the most, but Yuzu would at times get annoyed when Yūya makes her angry which causes her to hit him with a paper fan. Whenever she is depressed, Yūya would always support her. In return, Yuzu would also support him whenever Yūya is not in his omptimistc. Yuzu also has strong feelings for Yūya; when Sora mistook her as Yūya's girlfriend, she blushes, and is also jealous whenever Mieru makes an advance or calls him "Darling". However, Yūya is oblivious to these feeling.

Futoshi, Tatsuya, and Ayu Ayukawa
Yuzu acts as an older sister figure to them; she cares for them and supports them. They also care and support Yuzu.

Yūto
When she first met Yūto, he mistook her for Ruri and thus grow protective of her while she mistook him for Yūya. After she encounterd him, Yuzu started to doubt who Yūto was and thought he was Yūya in a costume. When Yūto saw her learning Fusion Summoning, he reliazed she is not Ruri, but still continues to look after Yuzu. He also considers Yuzu to be a lot like Ruri.

Mieru Hōchun
Yuzu and Mieru are shown to have a rivarly for Yūya's affection. They both have feelings for Yūya, and Yuzu gets jealous when Mieru makes an advance towards him or calls him "Darling".