Eglantine

Eglantine is a background character in the second season. She is played by an unidentified extra and debuts in the fifth episode of the second season. Eglantine is the septa at the Red Keep acting as governess of Princess Myrcella Baratheon.

Background
Eglantin is a septa of the Faith of the Seven. She serves at the Red Keep in King's Landing as governess and companion to Princess Myrcella Baratheon.

Season 2
Eglantine watches over Princess Myrcella as she plays blind man's buff with two courtiers.

In the books
In the Song of Ice and Fire novels, Septa Eglantine is a loyal servant of House Baratheon of King's Lading and Princess Myrcella Baratheon.