At first Yuri thought Godou was a fearsome person from her previous interactions with a Campione, but still attempted to convince him to be more modest in his actions with Erica. However, as time passed and the two interacted, she discovered most of the actions were on the part of Erica, and began to fall in love with Godou, though she is not yet willing to admit it, possibly even to herself. In Volume 5 Yuri has admitted that she has feeling for him and that she does not care if she is gonna be his wife or not, as long she is close with him, she would be happy. Yuri even revealed that when she first met Godou, she felt calmer around him than most people and knew at that moment he was different from the other Campione and that she was slowly falling in love. In Volume 7, Yuri even swore allegiance for life to Kusanagi Godou during the Youth Ritual until one of them dies. By the end of series, their relationship have gotten so intimate that they have sex after Godou return from his universes travel.
The pair first started out as antagonists, as Yuri attempted to control what she considered Erica's unseemly behavior in showing her affection for Godou all the time. After their various adventures together, the two have become more along the lines of friendly rivals for Godou's affections. Though the two still argue over Erica's public behavior.
Liliana and Yuri did not start out well in the beginning, due to at the time serving under Voban's who attempted to summon a Heretic God by killing Yuri. After having a change of heart and allied herself with Godou, Liliana tried to befriend Yuri, but the situation was awkward for a long time until their next upcoming battle where the two put aside their differences and started to get along.
The two are old friends, though Yuri appears to try and convince Ena to be more conservative and ladylike in her actions while Ena tried to teach Yuri to be more open-minded. Yuri, however, deep down see Ena as a true friend or sister out of all the girls due to their past together. Whenever Yuri perform the ritual with Godou, she would usually prefer Ena nearby. By the end of the series, the two became comfortable enough with one another that both of them were willing to have sex with Godou at the same time and even Yuri shown some sign of "attraction" towards Ena during it.
Hikari is Yuri's younger sister. The two seem close, and Hikari appears to support Yuri's relationship with Godou. While Yuri find Hikari strong and bold nature embarrassing, she does, however, care for her a lot and was afraid for her safety when she was kidnapped by the Monkey King. By the end of the series, Yuri trusted Hikari enough to become a shrine maiden in their house while Yuri and Ena went to study in Kyoto.
Lucretia enjoys playing with the innocent Yuri and will often teach her strange things.