NOW KIDS, TIME FOR SOME LORE!
The skydwellers begin their life (as any other troll species) as a wriggler with the colour of their blood and a set of underdeveloped horns. Their tail consists of two to three plumes with the troll's blood colour.
As they grow up, their horns develop and feathers will grow through amongst strands of their regular hair. Their skin will be soft with small downs, but still grey as regular trolls. They also have bulges like the other trolls, not limited by gender. When the young troll grows older, they will begin feeling sharp pains in their backs, as their wings will begin developing between the age of 9-11 sweeps, depending on the troll. These premature wings can be controlled, but are yet to be strong enough to carry the skydweller's weight. The size, colour, shape and usability of their wings depend on their blood and physical build, as some trolls will have bigger or smaller wings, multiple wings or weirdly shaped wings and some trolls might not even get the ability to fly ever, even if their wings are fully developed.
Furthermore, the plumage and patterns of the wings will form themselves depending on the hemotype. The horns will, also, be fully developed, their final size and shape being altered at this state.