Duke Asculith is King Aseron's brother. He is a Unknown Queen King(?), also known as a Hamadryad, a tall creature with greenish skin and branches popping out from under his leaf-composed clothing. He enjoys sailing and hunting monsters. 

Feeling that his passions, desires and skills lie elsewhere, he rejected his position as the King of the Fey, resulting in Lord Aseron taking the throne. 

Asculith has a squire named Ophio.

His ship, the Banyan Surfer, is not a traditional seafaring vessel. Instead, it appears as a tall central tree which seemingly grows from a bowl floating on the sea, and sends its branches down to the water; this results in an effect that looks like an individual forest. Each branch or root, seeking the stability of the ground, cannot find it, but instead grows together in a dense cluster. The whole thing ends up being a singular, floating tree with entwined branches form a solid floor. It is not a tall ship, nor does it appear particularly sea-worthy, but it seems to be doing well enough.

Vines serve as ropes, and sails are attached to the stronger boughs in a seemingly haphazard and random manner. Hammocks and little wood-woven cabins can be seen through the branches, alongside lanterns, cargo and cages entwined within the greenery - the latter holds all manner of prey and hunting trophies that Asculith claimed.