Yukari Sanjo is Hoshina Utau's manager.
Yukari Sanjo is Utau's manager, Kairi Sanjo's sister, and she used to be Yuu Nikaido girlfriend. She can see Shugo Chara. She's actually a member of Easter, but she quit Easter. When she's still at Easter, she asked her brother Kairi Sanjo to be a spy, spying on Guardian. She also manages Utau's performance, with the X eggs too. She and Nikaido are rival.
After she quit Easter, Utau's popularity sink to the bottom. She and Utau work very hard to make Utau rising again. She made a new company named Sanjo Productions, and they both work under that name.
Her relationship with Nikaido is later fixed, and Nikaido marry her. She's voice by Natsuki Rio. Her birthday is on seventh August.