Mimi Alpacas is a pink-skinned ogre with white hair styled in medium-length pigtails, crimson eyes, and curved horns. Red markings adorn her cheeks and shoulders, complementing her attire: a strapless black bikini top, matching stockings, elbow-length gloves, and a choker. Her voluptuous frame features smaller breasts compared to her older sister, Lisa Alpacas.

Guided by ogre traditions valuing genetic strength, Mimi relentlessly pursues Peter Grill, the newly crowned world’s strongest warrior, to conceive a powerful heir. Alongside Lisa, she confronts Peter after his tournament victory, proposing a breeding partnership. When rebuffed, she escalates her tactics—ambushing him in his bed clad only in a towel, orchestrating public confrontations, and participating in a coordinated seduction where both sisters discard their towels, overwhelming Peter’s resistance.

Mimi and Lisa employ blackmail to sustain their pursuit, threatening to reveal Peter’s indiscretions to his fiancée, Luvelia Sanctos. This strategy extends to covert maneuvers, such as hiding beneath a table during his engagement celebration to pressure him discreetly. The sisters scorn rivals like Vegan Eldoriel, deeming them physically inferior.

A member of the Ogre Kingdom, Mimi’s lineage includes her mother, Queen Nina Alpacas, who emerges in later narratives. While Lisa recruits Peter to pose as her fiancé in Ogrestan, Mimi’s role in this subplot remains undefined.

Her personality fixates on securing Peter’s genetic legacy, mirroring ogre societal priorities. Though aligned with Lisa’s goals, Mimi occasionally adopts differing levels of assertiveness. Framed as an antagonist through her aggressive tactics, her actions intertwine with comedic undertones stemming from Peter’s chaotic efforts to uphold fidelity amid relentless pressure.