Yuzu Hīragi/Relationship

Shūzō Hīragi
Having lost her mother not long after she was born, Shūzō is the only family she has and cherish him deeply. Similarly for Shūzō, Yuzu is the only daughter he has and has taken care of her ever since she was a baby alone, making him grew to have deep fondness for his daughter. This caused him to get depressed whenever Yuzu wasn't around and angry if there is a boy that he thinks getting too close to his daughter. Yuzu is shown to get occasionally annoyed by her father due to his goofy nature, often smacking him with her paper fan whenever he does something foolish. But as a father and daughter, they care for each other, and Shūzō 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 becomes somewhat an older sister figure to Yūya. Among Yūya's 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. Both are very close with each other, always supporting one another when either of them are depressed of something. Yuzu's feelings for Yūya is actually more than just a friend; when Sora mistook her as Yūya's girlfriend, she blushes, and is also jealous whenever Mieru makes an advance or calls him "Darling". Unfortunately, Yūya is oblivious to her feeling and doesn't show any interest on that matter, even protesting at the prospect of dating a crude strong girl like Yuzu. Regardless, Yuzu is someone that Yūya cherish deeply, even more than his other friends. This is shown during the aftermath of Battle Royal that showed Yuzu being the person that Yūya worried the most and his main motivation to join Lancers is to save Yuzu. As Yūya became more vulnerable on entering the Awakening state, Yuzu started to fear and grow worried of his emotional state, so much that she eventually told Yūya in his Duel against Sergey that she doesn't recognise him when he behaved that way and doesn't want to see him like that again.

Futoshi, Tatsuya, and Ayu Ayukawa
Yuzu acts as an older sister figure to them, guiding and supporting them in their Duels. Futoshi, Tatsuya, and Ayu fondly calls her "Yuzu-neechan" and usually waiting for her and Yūya in front of their school gate after school to go home or going to Duel School together. Aside from their Duel School activities, the three children sometimes also help Yuzu shopping at grocery stores.

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. Even after knowing that Yuzu is not Ruri, he still continues to look after her, not wanting her to get hurt nor involved in his battle and wishes for her to survive if it cannot be avoided. While initially wary of Yūto, she eventually realized that he is not a bad person, and like Yūya, he wishes to protect his friends and bring happiness to people. Thus, Yuzu come to his defence when Serena implied that Yūto and Shun were lying about their dimension's tragedy and cleared up the misunderstanding between him and Yūgo.

Yūgo
Yuzu was saved from Yūri by Yūgo, who mistook her for Rin. When they were in the Synchro Dimension, Yūgo and Yuzu built a quick friendship. Yūgo attempts to help out Yuzu with the issue of the Interdimensional Domination, such as trying to warn the citizens about the Fusion Dimension and getting annoyed when others laughed at her, he also signed her up for the Friendship Cup, believing it would be a good idea to convince others about the threat. Yuzu has been frequently annoyed by Yūgo, due to him mistaking her for Rin, causing her to hit him with her fan, or threatening to do so. When Yūgo was losing to Shingo, she was very worried and became shocked when Yūgo began dueling like Yūya and won.

Mieru Hōchun
Yuzu and Mieru are shown to have a rivarly for Yūya's affection since they both have feelings for Yūya. Yuzu gets jealous whenever Mieru makes any advance towards him or calls him her "Darling" to the point Yuzu almost smack her with her signature paper fan if not stopped by Futoshi, Ayu, and Tatsuya. In Mieru's part, she accuses Yuzu constantly seducing Yūya due to how close they are.