YoOO I like this-- the answer is, of course! Raven and Rose are humans, they have their good and bad traits, and they won't agree on everything all the time. I won't elaborate on Rose because Rosefinch is @synclonization's OC, but I can speak for Raven.

Overall, they are quite like-minded, you would normally not find a lot of clash in their day to day lives as they're both indoor persons. That being said, Rose is a very morally grey person, and this is from the start their biggest source of conflict, as Raven has a certain set of morals she won't change, and is present even in her work as an assassin.

They eventually get around this and get to know each other and actively try to understand the other, even when they still wont always agree in certain aspects. Outside of this, Raven does dislike her lover's workaholic side, but it comes more from wanting Rose to enjoy her free time a bit more or give herself something else to focus on rather than see it as boring, which isn't the case since she likes listening to whatever rambling her girlfriend will make.

That's the two biggest out of my mind, anything else would be too small or related to their complementing personalities, which goes into the same sack of 'they eventually get to understand each other'.

Cetus doesn't like that Deepcolor, initially, sees nothing wrong with assimilation and brainwashing to suit her own purposes. Of course, Deep doesn't really understand the issues with infringing on the free will of others. She's a seaborn. They don't really have much of a concept of "free will", at least not in the sense that humans do. When Cetus is upset about the very real possibility that his family, especially his father figure Krakii, will someday become assimilated into seaborn and lose their individuality, Deepcolor can only ask him why assimilating would be such a bad thing. Cetus gets VERY upset with her and basically asks her to leave him alone. Deepcolor is confused what she did wrong but leaves. This is the setup to a lot of events that happen later involving Deepcolor learning about the value of individuality, choice, and free will. So she eventually learns just how insensitive she was being by operating on seaborn logic. Deep perpetuating the harm her kind have done out of ignorance is something Cetus does his best to be patient with, but sometimes even he gets frustrated with her.