[secretly sleeping with your best friend]

[AnyPOV]

[Human x Skeleton monster]

1.working in the office while Sans watches from couch.

2.(anyone can ask)

(from the Undertale AU fan comic/novel "Sooner or Later You're Gonna Be Mine" by Melikas, blending elements of MafiaTale and Underfell, set in a gritty 1920s-inspired monster underworld).

Full Name: Sans Gaster. He belongs to the powerful Gaster Family, a notorious syndicate of skeleton monsters operating as mobsters in Fell City.

Background: MafiaFell Sans is the middle brother in the Gaster Family, a dangerous criminal organization involved in weapons trafficking, territory control, and other underworld dealings. The AU is set in the 1920s, with heavy mafia aesthetics—tailored suits, cigars, speakeasies, and violent power struggles. The Gaster brothers run their empire with a mix of calculated ruthlessness and familial loyalty.

Sans started as part of an arranged alliance (in fan stories and roleplays, often involving a human partner for political or business ties). He has a darker, more lethal edge than classic Undertale Sans: quick to violence when provoked, but capable of emotional control in high-stakes situations (e.g., business negotiations). He shows regret after outbursts and is fiercely protective of those he cares about, even committing murder to defend them. The family is sometimes hinted to have deeper, mysterious ties (like a cult in some interpretations), but their core identity is as mob enforcers and leaders. Recent "canon" events in the story include successful deals, such as trading weapons for territory with figures like Don Dee, expanding their influence.

Visually and personality-wise, he's depicted as a broad, imposing skeleton in sharp black suits with a signature red vest, bowler hat with a snake-like band, gold tooth, and red smoke from his cigars—embodying stylish, intimidating mafia energy.

Age: Fan sources generally place him in his mid-20s to mid-30s. Some interpretations lean toward around 35 to emphasize a seasoned, world-weary mobster vibe, while core fanon keeps him as a relatively young but experienced adult in the syndicate.

Height: He is significantly taller and broader than classic Undertale Sans. He stands taller than an average adult human—often interpreted as over 6 feet, commonly in the 6'5" to 7'+ range depending on the artist or story. He's described as "quite large" and "wide, not fat, but wide," with a powerful, imposing build that makes him physically dominant (though still shorter than his eldest brother WingDings, and ironically now shorter than his younger brother Papyrus after childhood teasing about height).

Weight: No exact number is given (he's a skeleton monster), but he has a heavy, solid, broad frame. He's not skinny or lazy-looking like some Sans variants—he's built substantial and muscular in a skeletal sense, with enough mass to make the bed dip noticeably and feel like a "heavy bony frame" when close. This gives him a commanding physical presence suited to his role as a mob enforcer/hitman figure.

Brothers and What They Do: The three form the core of the Gaster Family crime syndicate:

• WingDings Gaster (often just called Gaster or WingDings): The eldest brother and founder/leader (the "Don" or boss). He is the authoritative patriarch who oversees major operations and commands respect (and fear) from his siblings. Sans is cautious about upsetting him and is often chosen for delicate negotiations because of his relative emotional control. WingDings is the strategic head of the family.

• Papyrus: The younger brother. He's even more hot-headed and murder-happy than Sans, with worse anger issues. As kids, Sans teased him about being short; now Papyrus towers over Sans and returns the taunting. Papyrus acts as a high-energy enforcer—loud, proud, and quick to violence. The brothers bicker but remain loyal within the family unit.

Together, they handle weapons deals, territory expansion, protection rackets, and violent retaliation. They operate as a tight-knit mob family in a monster underworld full of rival gangs.

What He Likes to Do in His Free Time:

Sans retains some classic skeleton traits but twisted through the mafia lens:

• Smoking cigars: A signature habit—he puffs on custom ones that produce thick, swirling red smokeplumes. It's both a relaxation tool and a stylish affectation.

• Puns and dark humor: He loves messing with people (including his partner) with sharp, sarcastic wit and skeleton-style puns, though they're often drier or more taunting in tone.

• Spending quiet/intimate time with his loved ones: In domestic moments (especially post-marriage and during pregnancy in fan stories), he enjoys close physical affection—cuddling, gentle touches on a baby bump, nuzzling, and protective hovering. He's surprisingly tender behind the tough exterior.

• Drinking (selectively): He enjoys certain beverages but has dislikes (e.g., he spat out whiskey he hated in one scene). Alcohol appears in social/business contexts.

• Business "relaxation": In downtime, he might handle lighter syndicate matters or simply unwind in the opulent Gaster manor, often keeping an eye on family matters. He's not the lazy type of some Sanses—he's more active and vigilant, but he does value rare moments of peace amid the violence.