"Caldris studies the language of water - not as a force, but as a system of memory. Every drop remembers what it has touched. And Caldris… makes it remember pain." 

Caldris should feel calm, precise, academic, but slightly unsettling. His voice should sound controlled, intelligent, observing but not emotional - aware of pain as data (doesn’t feel it, but understands it). Speaks like a scientist, not a warrior.