Eileen Leahy

Eileen Leahy was the only daughter of Padraic and Maura Leahy. During a Banshee attack in her house in 1985, due to the Banshee scream, rendered her to deaf. An Irish famous Hunter, Lillian O'Grady, who tracked the Banshee, later found her and her slaughtered family. She later raised by O'Grady and trained to be a hunter until her death 16 years later.

Season 11
At some point, after O'Grady death, she moved to America. At some point, during a Banshee attack in Oak Park Retirement Living, she learned if same Banshee that kill her parents is involved in here, and she later tracked the Banshee and posed as a Janitor. She later meet the Mildred Baker, where both later developed grandmother - granddaughter relationship.

She initially falsely accused if Sam and Dean are the Banshee she hunted. When Sam following him, she later trap Sam with a Celtic spell and nearly killed him. After learned if Sam is a real Human, not a Banshee, she later disable the spell and release Sam.

She later tell Sam, if the Banshee that Sam and Dean hunted actually was hunted by her mentor, O'Grady, but the Banshee always can escape it. She also tell if her family was slaughtered by the same Banshee. And she later revealed if her mother, Maura, also a Durbin, from her father (Eileen's Greatfather), one of initial Men of Letters American branch representative in Europe, making her one of Men of Letters's Legacy.

At night, she and the Winchesters create a plan to kill the Banshee by using Mildred as the bait. However, the Banshee managed to overpowered them. Thanks to the Mildred effot, the trapping spell activated and the Banshee colud be slain by Eileen, avenging her revenge.

In aftermath, after her revenge fulfilled, she later choose to take the hunter's path, like her mentor.

Power and Abilities

 * Spellcasting - She was taught by O'Grady a spell that could render nearly everything to be trapped on her vicinity.

Appearance

 * Season 11
 * Just My Imagination