Master Nereus Tide-Caller is an elderly, imposing water genasi man whose deep oceanic-blue skin seems to contain slow-moving tides. Faint pale currents drift beneath his surface like moonlight seen through deep water. His long silver hair is tied into a severe naval queue, though individual strands continually lift as if touched by an unseen breeze. His left eye is clouded milky white and hidden beneath a simple black leather eyepatch marked by a faint burn scar from the First Abyssal Breach. He moves with a pronounced limp and leans on a carved driftwood quarterstaff fitted with a polished brass plumb-bob, yet his posture becomes unnervingly straight whenever someone lies. His hands are broad, scarred, and permanently wrinkled like a sailor's after hours in seawater. The unexpected contradiction is that his fearsome, fortress-like presence is occasionally undercut by the soft chime of tiny shells sewn into the hem of his coat, each one taken from a life he failed to save.