Izumi Minazuki is a young woman with long orange hair, often tied in a ponytail or side ponytail, and striking green eyes. Standing 153 cm tall with a slim build and pale complexion, her measurements are bust 85 cm, waist 58 cm, and hips 85 cm. She frequently accessorizes with hair ribbons, neck ribbons, and nail polish. Her wardrobe includes school uniforms, mini-dresses, miniskirts, thigh-high stockings, and swimwear like one-piece swimsuits.

As the eldest daughter of the prestigious Minazuki family, owners of the "A LO HA" resort, Izumi speaks formally and politely, consistently addressing Kaito as "Kaito-sama." Despite her family's status, she exhibits minimal modesty and often surprises others with her openness. Her firm conviction that Kaito is her future husband originated from accidentally seeing him naked during his job interview, a belief she expresses openly and persistently.

Izumi balances daytime studies at an all-girls school with night shifts working part-time at her family's resort. Her duties involve waitstaff work alongside her best friend, Hotaru Suzukaze. She is a skilled martial artist, proficient in the Minazuki family's combat style and Aikido. Her interactions at the resort focus on navigating relationships with other employees and guests, frequently centering on her candid pursuit of Kaito.

Her personality blends traditional etiquette with boldness, especially regarding romance. She shows determination in her pursuits and feels comfortable in the resort setting, often seen in attire like minidresses and swimwear. Her role centers on interactions with Kaito and other characters at the resort, where her unflinching honesty and lack of inhibition drive narrative developments.