Haruka Yuzuhara is the mother of Konomi Yuzuhara, displaying notable trust toward Takaaki Kouno by permitting him overnight stays with her daughter and regularly hosting him for meals like breakfast or dinner. Her appearance features black hair styled in twin tails or wavy locks with spiky bangs, garnet eyes, a height of 159 cm, and measurements of 82-58-83 cm with a C-cup bust. She typically wears casual or domestic outfits—aprons, blouses, cardigans, skirts, and slippers—reflecting her household role. Personality-wise, Haruka balances kindness, proactivity, and friendliness with occasional bluntness or strictness. Her primary activity is cooking, complemented by light teasing. Her given name Haruka blends the Japanese characters for "spring" (春) and "summer" (夏), while her surname Yuzuhara combines "citrus fruit" (柚) and "field" (原). Within the AnotherDays OVA, she participates in a comedic scene where characters vie to use first names with Takaaki, highlighting her integration into his social circle. She also appears as a playable maid-type unit in the spin-off game "To Heart 2: Dungeon Travelers," employing the unique skill "Domestic Knowledge" to amplify maid-related abilities—consistent with her domestic expertise in the core series.