Margarita belongs to the Habsburg group. She is named after Queen Margarita Theresa of the Habsburg family, inheriting the name from this significant royal historical figure. She expresses enthusiasm about her newfound freedom, contrasting it with a previously sheltered existence, declaring: "Master, I've recently found the fun of fighting! Use me more!" This reflects her transition towards embracing combat and independence.

Margarita stands approximately 168 cm tall with a slender build. She has dirty blond hair styled in a low braid over one shoulder, secured with a black bow. The hair features subtle orange tips. Additional small, black bow-shaped decorations sit above her right ear. Her pierced earlobes are noted. She possesses cinnamon brown eyes and pale skin. Margarita often wears a cheerful grin.

Margarita exhibits energetic and affectionate traits. Her dialogue includes enthusiastic requests like "Master, let's hug, hug! Yay! I'm Margarita!" and declarations such as "But for now, let's talk about love! Ahahaha ♥". References to "Uncle" suggest a reliance on or connection to another character for reassurance. Her interests include parties and smores, with fighting cited as a newly discovered enjoyment.

Margarita's design draws from a specific firearm historically crafted from marble-cut wood. Engravings include the Queen's monogram on the stock and the Habsburg family's silver double-headed eagle coat of arms on the upper section. This connects directly to Margarita Theresa's reign during Leopold I's rule and associations with Velázquez's portraiture.