Lenalee Lee (リナリー・リーRinarī Rī?) is a 16-year-old Exorcist from China. Her parents were killed by an Akuma when she was very young. Due to her ability to use the Innocence, Lenalee Lee was forced to become an Exorcist. Because she was separated from her brother - her single, remaining family member - at a young age, she went insane and had to be restrained due to repeated attempts of escape. During that time, she witnessed Rouvelier's forbidden experiments to create Exorcists artificially, and he became a source of her fear. When her brother Komui joined the Order to be with her, her sanity was restored. She now fights for her brother as well as her friends, as she now knows she has a home and family to return to. Her perception of the "world" consists of her friends and family; whenever one of her friends dies, it seems to her as if a part of her world has been destroyed. Oddly, Lenalee seems to have a recurring dream about her being alone in familiar ruins, which has a connection to a dream Allen has from time to time. The Dark Boots (ダークブーツDaku Butsu?), her anti-akuma weapon, take the form of a pair of black, thigh-high boots that give her the ability to run at high speeds, walk on water, and use sound waves as footholds.
In order to defeat a Level 3 Akuma, she evoked more power out of the Innocence than she could safely handle, causing it to miraculously turn to crystal to protect her. This marked an evolution of her Innocence that reduced her synchronization with it as well as her physical mobility, until she proved herself to the Innocence and it granted her a greater power. The process transformed the Boots from the Equipment-type into a new Crystal Form, which was never before seen. This power was awakened during a battle with a Level 4 Akuma when her Innocence "liquefied" and after drinking it, used her blood to reform her Dark Boots, allowing her to assist Allen in the battle. The Boots are made up of Lenalee's blood, and will repair themselves as long as she has blood in her body. When the Dark Boots are in their dormant state, they form blood-red anklets, one on each of her ankles. She is also thought to hold the "Heart of Innocence". She is voiced by Shizuka Itō in Japanese and Luci Christian in English.