Harriet Steer (ハリエット・スティーア) is a witch originating from Britannia.
She and Erica are both on a resupply mission during the time they met. They helped a girl (Mary) and Mary's Cat who got separated from her sister. They managed to bring Mary back to the area she was living (The Slums for refugees).
Her brightness and kindness that she can share with anyone in difficult situations may have had a positive effect on Erica, who was worried about being a witch.
- Harriet is most likely based on Harry Steer DFM.
- Having 11 credited victories and Distinguished Flying Medal (DFM) recipient. Unfortunately, Harry died and was announced as "Killed in Action (KIA)" on the 8th of June 1944.