Yūri/Relationship

Reo Akaba
Yūri 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 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 ordering 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 and Yuzu. Dennis knows Yūri enough to be confident of Yūri's skill, trusting Yūri to handle his mission alone.