Flagstaff

Flagstaff is an angel who worked for Castiel in a hospital along with Tessa, Oren e Constantine, where they performed minor miracles to save human lives. As her angelic name has eighteen syllables, she prefer using her vessel's name.

History
While Sam and Castiel go to track down Josiah, Dean interrogates Flagstaff, since she worked with Oren, the angel suicide bomber who kill Esther and six humans in an ice cream shop. During the interrogation, Flagstaff claims to hate Dean because he proclaim himself a hero when his method of saving lives is based on the use of weapons to take more lives. That angers Dean who, influenced by the Mark of Cain, held her against the floor and threatened her with an angel blade, ordering her to say names of people who were close to Oren. Afraid, Flagstaff named Constantine and Tessa, leaving the hunter atonic with the last name. Later, she expresses her revolt with Hannah and another angel for a "monkey" had threatened her with an angel blade. After Metatron's speech about how Castiel was responsible behind the angel suicide bombers, Castiel's dying stolen grace and how Castiel just cared about himself and the Winchester brothers, she abandons her leader along with the other angels when Castiel refuses to kill Dean for he had killed Tessa, joining Metatron. Presumably, she returned to Castiel's side after Metatron reveal his true intentions and have been arrested.