Eleanor Need works as both a doctor and fairy engineer in Dorothea's medical technology department. She specializes in providing medical services to colleagues, particularly concerning fairy-related biological matters, and does not participate in combat operations. Eleanor possesses long brown hair and brown eyes, typically appearing in her nurse uniform during duty.

Her responsibilities include examining individuals affected by fairy incidents. Following an incident where Marlya Noel was stabbed, Eleanor conducted a thorough medical evaluation to ensure the stability of the fairy residing within Marlya. During this examination, she criticized Free Underbar for failing to adequately protect Marlya, specifically highlighting his responsibility as her protector given her gender.

Eleanor later participated in a celebratory gathering marking Marlya Noel's integration into Dorothea, attending a bar outing alongside other agency members. Her professional background indicates she originates from the region of Redrad.