Queen Medb is a prominent character in the mobile game 'Fate/Grand Order,' which is part of the larger Fate series. She is a Rider-class Servant and is based on the legendary queen from Irish mythology. Known for her beauty and ambition, Medb is depicted as a cunning and manipulative ruler who seeks power and control. In the game, she is often portrayed as flirtatious and confident, using her charm to bend others to her will. Her role in the series involves various quests and battles where her leadership skills are put to the test.