Nana the Supergirl(1983)

Nana the Supergirl is an anime series following Nanako, a young girl who suddenly develops superhuman abilities but loses all memory of her past. Stripped of her identity and thrust into a world she no longer recognizes, Nanako must navigate her newfound powers while piecing together the mystery of who she was. The story blends action and coming-of-age drama as she learns to control her abilities and uncover the truth behind her transformation. With no recollection of her former life, every encounter becomes a clue, and every challenge tests both her strength and her determination to reclaim her lost identity.