Piglette Pancetta hails from the Orcland kingdom, where she faced relentless ridicule and oppression from other orcs. They deemed her human-like appearance unattractive by orc standards, fostering deep-seated insecurity and a self-perception as ugly and hideous. Despite this, her features align closely with human beauty ideals: shiny tan skin, a tall yet slender frame with noticeable curves, long straight dark-purple hair reaching her buttocks, deep-green eyes partially obscured by bangs, and pink lips. Distinct orc traits include two sets of pig-like ears—oblong-shaped atop her head and pointed at the sides—and a curly pigtail. She typically wears a light-pink minidress with thin straps, tribal arm-cuffs, a neck brace, gladiator-style leg bindings, and black shoes.

Initially presenting as shy, soft-spoken, and nervous around men—especially Peter Grill—Piglette harbors a vengeful desire against her tormentors. This fuels her participation in a scheme to secure Peter's genetic material, aiming to prevent Orcland from obtaining it. She becomes unexpectedly chosen as Peter's political bride, orchestrated by orc emissary Babe Roastpork and Guildmaster Albatross Sanctos to disrupt Peter's engagement. After being compromised with aphrodisiacs, she and Peter have intercourse. Piglette later lies about the encounter to shield Peter, revealing her capacity for secrecy and loyalty.

Following this, she joins the Brave Swordsmen's Guild to stay near Peter, outwardly maintaining a humble and reserved demeanor. Internally, she channels stress and resentment into a calculated plot against Orcland, occasionally revealing a cunning, strategic side. Her core personality remains gentle and domestically inclined, skilled in cooking and household management. Her relationship with Peter gradually fosters increased self-confidence, easing her initial insecurities while solidifying her commitment to secretly raising their child as defiance against her homeland. Despite her vengeful goals, she exhibits kindness and thoughtfulness, avoids direct competition with other women in Peter's life, and often speaks only when addressed first.