Kagami Tsurugi (Japanese: 鏡劔) is a Japanese student at Collège Françoise Dupont.  She attracts the attention of Adrien Agreste as his fencing rival,When the Miraculous is inhabited by Longg, Kagami becomes Ryuko, a dragon-themed superhero who helps Ladybug and Cat Noir "during particularly difficult missions" .Kagami is a fierce and thoughtful girl who is dedicated to accomplishing any commitment she makes. Likewise, she can be somewhat reluctant and quite stubborn, willing to go out and take risks regardless of what is at stake for her. However, she learns from her mistakes, knowing there are times she isn't the winner. Despite her wits, Kagami has a small habit of jumping to conclusions, as shown when she saw a picture of Adrien and Lila together quickly assuming Lila was the girl he told her about in Frozer.