Im just not sure how to interpret it. So my background knowledge is basically that this is a forest spirit and the theme is wrath... His appearance makes more sense if you know that. But its unclear, if this guy is essentially materialized wrath or if its just an emotion this guy feels in that moment you captured. The first thesis would be supported by that mad expression and the glowing hair. Its almost like the hair is pure energy But his arms seem to indicate that he is begging for something.. or its just a movement thats connected to the eating of the rose. If you combine the begging gesture of the arms with the rose in his mouth, you could almost think hes begging for love. Maybe his wrath was created by social disappointment - the thorns of the rose have left injuries in his mouth, making it bleed, which would underline that theory. But who would love a creature like him right? Good reason to be wrathful.
But hey, he could just be a monster that hates everything^^