Ms. Casey, portrayed by Dichen Lachman, is one of the employees of the Apple TV series Severance. Initially, she works in the Wellness department, offering therapy-style support to her colleagues, including Irving B. and Mark S. Though she’s a part-time worker, it’s later revealed that she had a personal relationship with Mark outside of the confines of Lumon. With her distinct short black hair and vintage-inspired wardrobe—often seen in a Peter Pan collar blouse paired with a dark sweater and tweed skirt, or a burgundy dress with a high neckline and grey heels—Ms. Casey’s style complements her quiet yet intriguing presence. Collect all the accessories of Ms Casey costume from Severance for Halloween and cosplay.