Einhard Stratos is a prominent character in the 'Mahou Shoujo Lyrical Nanoha' series, specifically appearing in 'Magical Girl Lyrical Nanoha ViVid'. She is a descendant of the ancient Belkan royalty and possesses a powerful lineage that grants her significant magical abilities. Einhard is known for her determination, strength, and a serious demeanor. She initially appears as a rival to the protagonist, Vivio Takamachi, but later becomes a close friend and ally. Her character arc explores themes of heritage, friendship, and personal growth as she learns to embrace her own identity and form meaningful bonds with others.