Willow when Steve and her first meet in The Return, Episode 10 of Season 2.
Willow Ranger is a character from Sterile Studios The Daylight Owl. She saves Steve in "The Battle for the Iron Valley".
Very little is knows about Willow so far, only that her father is the king of the dwarves and her mother is/was human. She died after the daylight owl possessed her and tore her too pieces, unleashing his true form.
She is also known for her shrill voice.