That is an opinion. For example, "Sarah: I think that the best character in Dragon Nest is the Dragon!.. Johnny: Well, I disagree. I think that the boy is the best!.." There's no right or wrong answer! ..
It depends on what unit class you like. I personally like Ogma, and Marth but you may like other characters depending on your fighting style.my favorite class is the flying ones so caeda (pegasus...