Profess'n Caskwyn moves with a slow, deliberate gait, almost as if weighed down by the centuries of knowledge he carries. His shell is mottled deep emerald with streaks of pale silver, etched with delicate arcane runes faintly glowing after dusk, evidence of decades spent inscribing magical wards for protection. His eyes are cloudy but sharp in focus, reflecting flickers of warm amber and hazel deep beneath bushy, white-tinged brows. Despite his grand shell, he wears a worn, patchwork cloak of midnight blue velvet, studded with tiny, twinkling charms sewn on by generations of students. Surprisingly nimble fingers decorated with multiple silver rings move with unexpected grace when handling delicate books or chalk, though he forgets mid-sentence often, trailing off into contemplative silence. His sprawling beard is white, streaked with faint green algae stains from swimming in lakes. An incongruous element is his fondness for bright red slippers with golden bells, which jingle softly as he walks, creating an odd yet endearing musical signature.