Veyrún stands taller than most elves, long-limbed and upright, with a measured gait that seems to place his feet precisely between roots and stones. He favors his left side when turning, not from injury but from years of carrying a staff in his right hand. His robes are rich with texture: heavy emerald fabric, cool silver stitching, and raised embroidery of twisting branches, open flowers, and curling vines. A mantle of living leaves rests across his shoulders, its edges threaded with silver chains and tiny green gemstones. The leaves are always slightly damp and smell distinctly of crushed mint and rain-soaked soil, a scent he appears not to notice. His unexpectedly conspicuous habit of carrying a tiny painted wooden bird on a cord at his belt, polished bright with handling, makes him seem less austere than his ceremonial robes suggest. He moves with deliberate patience, yet his mantle stirs a heartbeat before he does, as if the plants around him anticipate his choices.

Veyrún is generous with labor and medicine, yet guarded with explanations. In calm company he is attentive and curious, asking about people's daily work as readily as their grand plans. Under pressure he becomes precise and procedural, sometimes so intent on preventing harm that he forgets to ask others what risks they are willing to take. When he is alone, he speaks to plants as if they are old witnesses and allows himself a dry, almost mischievous humor.

Veyrún grew up tending an ancient woodland nursery where each family cared for a patch of trees whose roots held the memories of their dead. He was a gifted keeper of plants but a poor keeper of boundaries: he let travelers rest in the grove, even when the elders warned that the road brought danger. When a fever swept through the nearby settlement, he secretly used the nursery's oldest tree to draw sickness from the children. The children survived, but the tree's roots blackened and the memories held within it began to unravel. That failure changed his idea of mercy. He still gives aid readily, but now weighs what it may cost others. He serves as an envoy and guardian for the Mallowmusk Keepers, a local band named for the pungent weed that overtakes every path in their valley. His niece Odelia, a practical ferrymaster, believes he is too willing to bargain with dangerous powers. His former apprentice Hareth left after Veyrún refused to burn a village orchard suspected of harboring a blight. Rival natural philosopher Yasmin argues that the blackened tree could be healed by studying the disease rather than sealing the grove. Veyrún is trying to keep the grove's failing roots alive while deciding whether the truth about the children and the tree should be told to the families.