Elsa Archfield is a Rank A adventurer, Leader of Sharp Edge, an all-women adventurer party.

Sharp Edge is one of the five groups of mercenaries and adventurers Elizabeth (or Ellie) hire to join the Sarjan conflict. Ellie(and Mireille) join Sharp Edge temporarily for the duration of the conflict. The two women quickly become friends. If Ellie never tells Elsa directly, Elsa realizes fairly quickly that the Merchant who hired her is actually Elizabeth Leiston, making her one of the few people who know her background after fleeing the Kingdmom.

Elsa's element is unknown, but she's a Rank A adventurer specialized in swordmanship, among all the adventurers and mercenaries Ellie hires, she's the only one who has a Divine Artifact.