I didn't have Jinbe's written down in the same file as the rest of the Strawhats, but I remember what I always have him as anyways. He's, to me, the perfect example of a Maid of Blood. Maids, as far as we can tell with Jane and Aradia, directly experience the negative parts of their aspect and in turn understand how to utilize their aspect better. Jinbe gets a firsthand look at the metaphorical chains that keep the fishmen down, as well as the inability for those of "different" blood to get along despite the fact that in truth the same blood runs through their veins. Though I think maids are the counterpart to knight rather than the sylph as many believe, I don't think it's crazy to say that maids have a strong basis of nurturing similar to sylphs, which is obviously a huge thing with Jinbe.