well about dyne worries, I think it's hard to explain but... it's obvious that he is your fursona, and it feels so different compared to facing other characters.
so like, on Endless Bounty and Engaging destiny your OCs feel like some special element, just some surprise and fun for the devs and I feel it's ok and cute, but if these characters play major role in the story... I don't know, it feels some... like some powerful presence try to intervene? lol I don't think I can express it well.
but I don't wanna just say that "it is bad thing" or "don't do this, it's not recommended". because I think dyne is quite attractive character in many aspects. so I hope you can get through the difficult parts and make it nice!