Gerson is an elderly, green, turtle-like monster with a rugged but friendly appearance:
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Shell: Brown, large, and slightly cracked from age or battle.
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Face: Wrinkled, with warm eyes that convey wisdom and humor.
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Clothing: In Undertale, he wears a simple brown vest with a light undershirt. His outfit gives off an old-time adventurer vibe.
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Accessories: Often seen with a small beard or scruffy chin spikes resembling whiskers.
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Body Language: Stooped slightly, but carries himself with pride.
🏛️ Personality
Gerson is wise, kind, and humorous — the quintessential “old war veteran” who enjoys telling stories to younger monsters.
He has a great respect for history, honor, and the younger generation, often encouraging them to “go out and make history.”
He’s jovial and friendly but also reflective, aware of the mistakes and struggles of the past. He treats even humans with understanding and compassion.
⚔️ Background and Lore
In Undertale
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Gerson lives in Waterfall, where he runs a shop.
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He was once a renowned warrior who fought in the war between humans and monsters.
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After the war, he became a historian and mentor, recording the events of the monster kingdom.
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He’s the one who named the underground “New Home” after the monsters’ relocation.
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He gives deep lore to the player about Asgore, Asriel, and the war, showing his extensive knowledge of monster history.
In Deltarune
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Gerson passed away before the events of the game.
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He is honored through:
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Gerson Boom Memorial Bench in Hometown, located near the Church.
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His granddaughter, Noelle Holiday, who remembers him fondly.
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Alphys, who teaches his old class at the local school, referring to him as “Mr. Boom.”
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His legacy remains important; his writings and stories influenced many, especially those who became teachers or historians after him.
