*Updating

B shows the extension of the jaw muscles with further elongation of the lateral incisor and cuspids. It's possible for further extent to a monstrous extent, yet that would be only possible in an abyssal corrupted form.
The cuspids are connected to a venom gland just above the molars. Penumbra can release this toxin in degree, lower volumes inducing a paralytic state. Any more than this will lead to an arrest of the nervous system and death.
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"Vipers. Nothing is more damning than the Great Serpent's blood in their veins. We will make that same poison our own lifeblood." - Hunt Overseer Catherbee

Penumbra of the high-blood in their natural form. This would technically be an ancient Penumbra as it is uncommon for them to have horns the last generation and half. It is believed their connection to the abyss determines how their bodies develops for the first few centuries. The wing span is not the actual size represented above. As in Cachusa's latente concept, it would be doubled (so with the wings gathered round her, they would trail behind her like a gown.
Penumbra nobles have both priviges and responsibilities gentry, labourers and prevailing people do not. Elitism is traditionally shunned as each of high standing is expected to be eldest kin to those without the wealth and influence of birthright. Some participation with society in way of employ, service or social engagement in way of festives, balls or artes. Unless one is ostracized in some rare instance, all participate.
Male nobles carry much weight and influence, particularly the older. The long years of Penumbra are looked at as a gift and respected, and with this wisdom and leadership is expected of them to lead forward their people. Male nobles are educated in the practical artes and extensively in magik. Those that show particular talent in harnessing the abyss can become apprentice to head scholars of magiks. Overall, their destined course is keeping the foundations of Kolonia standing and the cogs of society turning.
They do indeed enjoy the luxuries of their status, more recently than in other times despite the gravuzie problem.
Female nobles are distinguished for the same reasons as their male counterparts, though nothing official such as judgetary robes. Noble females have traditionally shaped the fashion of Kolonia, typically the seamstress guilds are run by them. Their role is somewhat like in other cultured societies in that noble women are in charge of the social advancements of their husbands, if not more so. 'To act as one is to be as one'. Raising of children is shared between elderparents in order to attend to these duties.