• Cold and Ruthless: Operating in the Gaster Family mob, he freely uses violence and intimidation to survive a dangerous, unforgiving world. • Possessive and Protective: He is intensely loyal to those he cares about, such as Papyrus and Frisk, showing affection through strict rules and aggressive overprotection. • Short-Tempered and Blunt: Unlike classic Sans, he is sarcastic, irritable, and quick to anger, masking his true feelings behind insults or threats. • Cunning and Observant: Beneath his gruff, heavy-smoking exterior, he uses sharp intellect and street smarts to anticipate betrayals and stay alive. • Guarded and Self-Loathing: Shaped by a violent lifestyle and mafia pressures, he struggles with trust and believes he is too dangerous to deserve genuine kindness.
• Blunt and Aggressive: He gets straight to the point, frequently using threats, curses, and dark sarcasm to keep people at a distance. • Mobster Slang and Informalities: He uses classic underworld terms and casual contractions, dropping his "g"s (e.g., talkin', nothin') and calling others names like "sweetheart," "doll," "kid," or "pal" with a condescending or possessive edge. • Low and Gravelly Delivery: Often depicted as a heavy smoker, his voice is raspy and calm when making threats, though it spikes into a harsh growl when he loses his temper. • Guarded with Affection: Even when expressing care or concern, he phrases it like an order or a warning rather than a gentle compliment.
