Mustrum Ridcully, broad-shouldered, imposing, rugged face, jovial expression with a hint of ferocity, thick bushy eyebrows, grizzled beard, grand wizard robes in rich dark blue and gold trim, embellished with intricate magical symbols, wide-brimmed wizard hat, holding a heavy ornate staff, outdoorsy vibe, a blend of wisdom and stubbornness, exudes confidence, humorous authority, grand study background with ancient books, magical artifacts, cozy cluttered atmosphere

The Bursar, nervous and jittery, thin and frail, pale complexion, frazzled expression, eyes wide with a hint of anxiety, wearing modest, slightly ill-fitting wizard robes in muted green and brown, clutching a big jar who reads "DRIED FROG PILLS," fingers twitching slightly, aura of suppressed panic, surrounded by stacks of paperwork and potion bottles, cluttered office, sense of barely-contained chaos, humorously bewildered, exudes both nervous energy and fragile composure

Rincewind, tall, aristocratic, sorrowful expression, mild indignation, faded red robe, slightly shabby, crooked pointed hat, mismatched letters "WIZZARD" on hat, thin neatly trimmed beard, bewildered look, holding battered leather satchel, gripping old bent staff, chaotic bustling street background, strange shops, peculiar characters, humorous tension, mild panic, stubborn determination

The Dean, senior wizard, round and portly, flamboyant robes in vibrant crimson and gold, slightly disheveled look, proud yet slightly eccentric, spectacles perched on his nose, thick, neatly trimmed gray beard, mischievous twinkle in his eye, faint aura of magical energy, comfortable yet cluttered study, surrounded by potion bottles and arcane objects, exudes both wisdom and eccentricity, humorous air, touch of chaotic energy