So in this volume there was a bit more of action and we have Yuri demonstrate that she can be self-sufficient and fight after she spent a few days, weeks? training with Tito's sisters (I'm sorry, I don't remember the names.) She doesn't need to depend on other people to participate in a battle and she can definetely save people! She also decides to believe in herself and to not backup when someones tells her that what she's going to do is dangerous, she is a strong girl, she is pretty useful... only that when Kail tells her that he doesn't want her to accompany him, first because is dangerous and second because she is going back to Japan so she needs to stay safe and not move from Hattusa, she doesn't do anything! She didn't put enough strength to fight him, she just became a passive woman who agreed to stay back and she just sat there, depressed because it would mean that she wouldn't see him again. Yuri in the end cries because she thinks that if she can't go with him is because she believes he doesn't like her. Yuri is playing the passive role with Kail, she barely fight him back and when she does, she ends up angry and telling him to go with other women, meaning she's a bit jealous becausen she isn't the only woman for him (although we haven't seen Kail with another woman... yet.), but Yuri's in conflict with herself. She wants to go back to her time and she wants to stay, for Kail. She needs to make up her mind.
Also, Yuri reaffirms again that she loves Kail, even after he spent almost the entire volume ignoring her and after she decided to not tell him that because she "can't and to stand by his side she needs to be Ishtar". In the end, when Kail agrees to take Yuri with him thanks to his brother, she thinks "I'm just happy as long as I can be with you" which can be a reasuring way to tell that she's already fallen enough to think those 10 month she will spend with Kail are going to make her mind change to go back.