Karen Kohiruimaki is a central character in the anime series Sword Art Online: Alternative Gun Gale Online. She is a university student who is self-conscious about her tall stature. In the virtual world of Gun Gale Online, she adopts the avatar LLENN, which is the opposite of her real-life appearance—short and cute. LLENN becomes known for her agility and combat skills, earning the nickname "Pink Devil" due to her pink outfit and tactical prowess. Karen's journey in the game helps her build confidence and form meaningful friendships with other players.