Yūri/Relationship

Reo Akaba
Even though Yūri doesn't care of Academia's goal and only joins to have some fun, he appears to be very loyal to Reo, obeying all of his commands. He will do his best to fulfil his given order and didn't dare to disobey it. As such, despite wanting to turn Yuzu into card, he didn't do so because Reo had ordered him to bring her back unscathed. Yūri seems to be one of Reo's most trusted Duelists amongst Academia, as he personally gave only Yūri alone the order to capture Yuzu and her dimensional counterparts, something that only a few Academia Duelists knows. And Reo only ordered Yūri to fulfil the mission, proving that Reo is confident in Yūri's skill.

Dennis Macfield
Dennis is Yūri's acquaintance. Their relationship hasn't been explored further, but both seems to have known each other for long times since Dennis has helped Yūri in locating both Ruri, Yuzu, and Serena. Dennis knows Yūri enough to be confident of Yūri's skill, trusting Yūri to handle his mission alone.

Yūgo
Yūri first met Yūgo when he kidnapped Rin, Yūgo's childhood friend. Since then, Yūgo bears strong animosity towards Yūri and travels from one dimension to another to hunt him down. Yūgo's obsession on Dueling him quite annoyed Yūri, who only saw Yūgo as bothersome and doesn't worth his time, usually ignoring Yūgo when the latter challenged him to Duel and instead continuing his mission. Yūri's interest in Yūgo started to spark when he found out that Yūgo had defeated Serena, and finally agreed to his challenge as he now considers Yūgo capable of providing more fun to his hunting game.