Willowings' whiskers

[Prompt: A species with an unusual form of communication]
Willowings have no voicebox, but they have no trouble having their thoughts "heard." You simply have to learn how to speak visually, three-dimensionally, like the spreading branches of a tree.
You can't miss a willowing, if she wants to be seen. Willowings are (teen) human-sized mantidoids, in possession of a presence retractable like cat claws, so that they can cammand an entire room when they wish, and hide ever else. Perhaps their most distinguishing feature, however, is the mop of feelers spilling over their heads and "shoulders" like a crown of willow branches. These are the anatomy we'll focus on for the article.
These branches, whiskers, prehensile dreadlocks, serve a series of critical purposes. First, they are functionally their eyes. They work remarkably differently from the goo spheres we classically think of as "eyes," but willowing feelers possess cells that are sensitive to light, EM waves outside the iric spectrum, electricity, and small particles (making them effectively noses as well). Ironically, only generations after creation did these feelers develop much feeling, but they have gotten good at it. Now, they can function a lot like fingers. There isn't much strength in them, but they're whisker-sensitive and dextrous as dragonflies.
From this thousand-finger ability arises a natural form of communication: complex, multidimensional sign language! Imagine a sign language where you have hundreds of fingers, long and flexible as snakes. Willowings have simplified languages they can use to communicate with few-fingered beings, but with their full arsenal, their language is symphonic. They can sign music at each other, with strands to spare. And with so many speaking tools at their disposal, they have been able to create language so nuanced, they can very nearly truly understand each other. To us single-channel voicers, such a language is unfathomable to a Lovecraftian degree.
And, of course, the act of touch between feelers is its own art. Think of the lovely complexity of hand-holding, multiplied by a hundred, a thousand. The tap or stroke of a feeler can whisper so much to another willowing, and people can read one another's entire histories in a mutual tangle of branches. Kisses and sweet nothings and a taste of truly knowing someone -- you wish you could have contact like this. Do I need to mark this article Mature now?
Really puts a whole new meaning to the term "head-voice," huh
(Note on one source of inspiration: In the series Leven Thumps, there's a passage that describes an ancient tree who can see through his branches or leaves, and thus has 360-degree vision. I couldn't get that out of my heart. Didn't remember that scene until after I'd worldbuilt the willowings, but clearly that Thumps tree is in their Intellectual DNA.)