Kagura

Forename:
 * Kagura Inou from Snow Radish Vacation
 * Kagura Mikado from Fake

Surname:
 * Chieri Kagura and Miyuri Kagura from Rebirth

Connections
Miyuri appears in the game Fake alongside Akira Nanase, who in turn originates from Milkyway as the protagonist's younger sister. Also in Milkyway is Sayura Kusumoto, who later appears in Summer Radish Vacation 2, which in turn is a sequel of Snow Radish Vacation, of which Kagura Inou is the protagonist.