Erza Scarlet is a prominent character in the anime and manga series Fairy Tail. Known as 'Titania', she is one of the most powerful mages in the Fairy Tail guild and serves as a strict yet caring mentor to her fellow guild members. Erza is renowned for her Requip magic, allowing her to switch armor and weapons during battle. Her strong sense of justice, fierce loyalty to her friends, and complex past make her a compelling and integral character in the series.