Cyan Sung-Sun

is an Arrancar in Sōsuke Aizen's army and one of Halibel's three female Fracción.

Character outline
Sun-sun has long, flowing green hair and three dots below her right eye. Her mask remnants create three hair clip-like extensions on the right side of her hair. She dresses somewhat like Luppi, with sleeves that extend well past her hands with a single slit in each one. She also wears two belts criss-crossing each other on her waist. She not been shown to carry a zanpakutō and the position of her Hollow hole is still unknown.

Sun-Sun appears to be the most composed and mature of Halibel's Fracción, such as advising both Apache and Mila-Rose to stop arguing, as it makes them look weak and then chiding their angry responses.

Synopsis
Sun-Sun makes her first appearence alongside Halibel and the rest of her Fracción observing the battle between Ichigo Kurosaki and Grimmjow Jeagerjaques. As the battle intensifies between the two, Halibel responds to her Fracción's unease that being afraid of an Espada's released form is simply a natural reaction.

Later She, Apache and Mila-Rose appear alongside Halibel in the fake Karakura Town along with other two strongest Espada and their Fracción to do battle with the Gotei 13.