I have to disagree about him not understanding human emotions and such. Of all the were-dolphins here, Rino is actually the second most intelligent, Beom being the first, as such he has one of the best understanding of human emotions. It's exactly that why Rino has a shitty personality. He experienced first hand the cruelty of humans and that contributed to his shitty personality.
If we're talking about realism about being a dolphin, then the dolphin dude in the fist couple takes the cake. That dude had no understanding of human morality and relationships at all. Of all the were-dolphins, he was the most animalistic, until Mokhwa came along and finally "teaching/guiding" him how to be human.
Wow spot on
Probably gonna get hate but Rino was the best character ever. He kept stuff real, and yea he had a somewhat shitty personality but it was the most realistic considering he's a dolphin and he doesn't understand human emotions like compassion, guilt, etc. I loved the fact that the third couple wasn't your typical lovey dovey couple. Like they had their flaws, and they may have reconciled in the end but we didn't get the full closure that we needed but again, the author kept it real and I really like that they did that instead of just making them confess their undying love for eachother. I've read that stuff way too many times and it gets boring at one point.
Anyways, that's just my opinion (⌒▽⌒)