Eris Boreas Greyrat is a prominent character in the anime series 'Mushoku Tensei: Jobless Reincarnation.' She is a noble girl from the Boreas Greyrat family with a fiery and energetic personality. Initially portrayed as brash and aggressive, her character undergoes significant development as she trains under the protagonist, Rudeus Greyrat. Despite her tough exterior, Eris is determined, loyal, and possesses a strong sense of justice. Her role in the series is crucial as she becomes a skilled swordswoman and a key ally to Rudeus, accompanying him on various adventures and personal growth journeys.