Mikoto Sakuragawa is the dedicated personal maid and bodyguard to Erina Shindo, responsible for her safety and daily routine. At 28, she presents a mature figure, standing taller than others with a developed stature. Her appearance features dark brown hair in prominent twin tails, pale skin, deep green eyes, and a noticeable bust. She consistently wears a Gothic/Lolita-inspired French Maid outfit: a black dress with white trim, puff sleeves, a fitted waist, and a mini-skirt layered over a white ruffled blouse. The ensemble includes a black ribbed corset, black above-the-knee socks secured by white garter bands, black tie shoes, and sometimes white gloves. Accessories consist of a Gothic/Lolita hairband and a formal choker. She stands 1.62 meters tall, weighs 51 kilograms, with measurements of 84-56-82.

Her personality centers on unwavering loyalty to Erina and her duties as both protector and caregiver, extending to the team of assistants she leads. Mikoto exhibits natural leadership, effectively organizing protective efforts during crises, such as guiding schoolchildren to safety, balanced by humility in her authority. Despite professional confidence, she experiences significant awkwardness in romance, persistently attempting to find a husband before turning 30. This pursuit manifests in repeatedly trying to secure signed marriage registration forms, often slipping them into boys' test papers or tricking individuals like Sōji Mitsuka into signing.

Beyond her primary role, Mikoto occasionally serves as a substitute physical education teacher at Yōgetsu Private Academy, where she is permitted to wear her maid outfit during school functions. She also acts as an adviser to the school's Twintail Club. Her physical abilities are notably exceptional for a maid.