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Aquarina's Status was indeed quite surprising, it even showcased her Magic Circle and Physique like mine! My Familiars seem to be able to grow stronger through evolutions, and have Ranks similar to the Ranks Monsters have, but it seems that humans are different.
Instead of Ranks, the Magic Circle and Physique are directly shown. Well, the only one I could compare to would be Nephilim and Furoh, and both don't seem to possess a Magic Circle nor a specific Physique thing.
Unlike that, Furoh grows stronger by evolving his own body and strengthening all of his powers at once, seems to be something unique of a lot of tribes of demons, which have a similar growth type than Monsters.