They suited their roles and they were able to convey and bring out the emotions enough to move viewers like me. I think they were perfectly selected and assigned to the characters.
I can't say anything about the casting actually. ***My favorite episodes are the ones that involved the worm (a bit scary, dark-toned, and serious than others) and the love of Duan Weiran.*** Each episode tackles the BOT officers solving cases and the backstory of transformer criminals (I've she'd a lot of tears almost every episode because of them T-T). Along with their other team members, they solve conflicts in the human world that concerns the activity of their kind. The two ended up as partners in BOT after an incident in Mingde revealed that Hao Yun is a special human whose memory can't be erased.(quick explanation: after an operation, BOT officers erase the memories of humans in order to conceal the existence of transformers). For the leads, we have Hao Yun, a "human" veterinarian and Aiai, an eel transformer officer. Transformers are humanlike species that can change into animals. This is set in a world where humans and transformers coexist. I actually wasn't sure at first if I should watch this since there's no one recommending it and it's not my usual cup of drama but since I've seen it I'm telling you guys DON'T SLEEP ON BOT.
I noticed that nobody left a review so I did. This review may contain spoilers This is my first time writing a review (^-^)V