Siss-Teth stands like a rooted pillar that has decided, for the moment, to walk. Her broad, iridescent emerald scales are dulled by a fine permanent film of red-brown mineral dust, while living moss mats her shoulders and hangs in ragged fringes from her elbows. Petrified ironwood runes lie pressed into the scale ridges along her arms, their edges worn smooth where generations have touched them. She moves with an unexpectedly careful, side-to-side sway, testing ground with the halberd's butt before committing her weight. Her breath carries the scent of wet stone and crushed leaves; close by, the faint click of scale against scale sounds like pebbles turning in a stream. The surprising detail is her fastidious grooming: she parts and combs the moss on her crown each morning with a carved bone pick, and becomes visibly displeased when someone calls it a crown.

Siss-Teth is welcoming in practical ways, offering shelter and food, yet distrustful of anyone who treats the Nexus as a resource. She can be gentle with the frightened and blunt with the confident. In calm moments she listens longer than most expect; when the ground trembles, she becomes decisive to the point of shutting others out. The Watershed Severing taught her that resolve can save a region and still wound the people living in it.

Siss-Teth was hatched beside a warm root spring when the Verdant Heart Nexus still pulsed in long, predictable seasons. As a young defender, she believed every danger could be met by placing herself between it and the roots. That conviction broke during the Watershed Severing. A fissure began racing through a populated route, and Siss-Teth chose to collapse a root bridge to stop it spreading. The act saved the deeper channels, but stranded families on the wrong side and left the Root-Sovereign Conclave's reputation badly damaged. She still remembers the wet crack of the bridge giving way, and the smell of sap turning sour under stress. She rose from field captain to martial defender of the Conclave, learning that stewardship means hearing the people endangered by a decision as well as guarding the thing beneath them. She remains close to Tekk, a route-keeper who lost kin in the severing and now challenges her decisions in public; their arguments are sharp, but neither permits others to speak of the other as an enemy. Siss-Teth also trusts Kett, a young saurian mapmaker whose careful surveys have revealed new leyline tremors, though she fears the Conclave will send the youth into danger before they are ready. Now unfamiliar surges disturb the crystal caverns and gravity sometimes tilts along the root paths. Siss-Teth suspects outside siphons, but knows suspicion can become an excuse to deny aid or knowledge. She is trying to secure a binding agreement that would let visiting arcanists examine the Nexus under warden supervision, while resisting pressure from her own defenders to seal every route.