That is part of Yuri's problem... He sees his purpose as a knight to help the teams in whatever way he can--take hits, mediate when necessary, etc--but he also thinks the Knight's should be doing more than that, like working more with the Personae to restore the world. He is all for restoring Aather! He is really very fond of the world.

The system... he is less fond of. He doesn't have the same bitterness and hatred towards it because he doesn't know the full span of it like he does the Empire, but that's another reason why he wants an in with the Personae. He wants a better idea of the system before he decides to completely fuck it up.

Would Vincent ever team up with Yuri in an epic plot to over-throw The Man.