Mimiru Tanaka is a main character in the .hack//SIGN anime series. In the virtual reality MMORPG known as 'The World,' Mimiru is an energetic and kind-hearted player who befriends the protagonist, Tsukasa. She plays the role of a Heavy Blade and is known for her loyalty and compassion, often acting as a supportive figure among the group. Mimiru's curiosity and determination help drive the story forward as she seeks to unravel the mysteries behind Tsukasa's predicament.