Quation(Found their name, lucky me) is what I called them back when I first wrote about them.
Though those poorly drawn circles across her body may give you the thought that these people are reptiles, you are wrong(Sorry to the negative three people who thought that). Those are in fact not scales, and are actually enlarged skin cells. Due to weird alien biology, they lack the teeny-tiny adorable DEAD skin cells like us humans, and instead have enlarged versions of these. They 'float' across the sticky solution which coats Quation muscular and fat tissues, like tiny continents, forming a protective barrier against blows caused by physical objects, rather than diseases and such(And they obviously don't protect against emotional harm). Thus, they're relatively succeptable to most diseases. Though, alien diseases, not built to attack a creature with completely foreign biology, rarely harm them.