Kagami Tsurugi

 is a Japanese girl who appears in Season 2 of Miraculous: Tales of Ladybug & Cat Noir. She is a new student at Collège Françoise Dupont who attracts Adrien, being a rival for him in fencing. In "Riposte", after mistakenly thinking that she lost the fencing battle between her and Adrien, she is akumatized by Hawk Moth into Riposte, a fencing themed supervillain.

Physical appearance
Kagami is a Japanese teenager of slender figure and average height. She has pale skin, freckles, light brown eyes, and short black hair with blue reflections.

Civilian attire
Kagami wears tight red sleeves under a slightly darker red quilted vest with a plain collar, along with plain red tights. On the ring finger of her right hand, she wears a black ring that has her family's logo, which is a Japanese symbol that means "female" and has two long outward spikes stretching from the mark.

As Riposte
Riposte's face is silver, having red eyes. She has a silver helmet with angular sides and a red circle on the center of the forehead with the Tsurugi logo. Her body outfit is silver armor, including a breastplate, pauldrons, and tassets, while her arms and legs are solid silver. On her feet, she wears silver high-heel shoes. Her right hand seems to be or holds a sword-like extension with a triangular guard and a red circle bearing the Tsurugi logo on the center of the guard.

Personality
Kagami is stern, thoughtful, and adaptive. She 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. She is an aggressive fencer, and will taunt her opponent during the fight. While she doesn't like to lose, she downplays her upset feelings and respects her rivals. However, Kagami is a very hospitable and determined individual who learns from her mistakes, knowing there are times she isn't the winner. She also forms a friendship with Adrien after they both approach each other and solve their conflict professionally, suggesting an understanding, calm, and objective side.

As Riposte, she is furiously obsessed with getting a rematch with Adrien and winning it, even if he is in no condition to fight due to his injured ankle, and she considers people that she views as not being good enough fighters as not being worthy, like Ladybug. She is also arrogant, and she doesn't have a problem with outright attacking her opponents when they have no chance of defending themselves. However, despite this, she follows Hawk Moth's commands without question, even if they conflict with her own goals.

As a civilian
Kagami is extremely skilled in fencing, both in defensive and offensive movements. She is also very agile, doing several acrobatic feats while dueling.

As Riposte
Riposte wields a sword in combat, and as her sword is directly attached to her hand, it is impossible to remove it. She uses the sword to strike at incredible speeds and slice through any material. She can create shock waves with her sword to slice objects from a distance. Also, she is capable of leaping great distances, and she is durable, quickly recovers from having an entire chimney collapsing on her to return to fighting.

Trivia

 * Kagami was revealed on a Season 2 synopsis from TFou on August 31, 2017.
 * She was teased as a new inhabitant of Paris in a Brazilian synopsis for Season 2 on O Universo da TV.
 * Kagami is a Japanese name that means "mirror." Tsurugi is a type of Japanese sword.
 * Feri González noted that both Kagami and Luka are "charming, rounded characters" who are not limited to roles as alternate love interests.
 * Her akumatized form was first revealed in a promotional video for Season 2 from TFOU.
 * Kagami is an only child.
 * In fencing, the word "riposte" refers to a quick return thrust following a parry.
 * A colloquial use of the word refers to a quick, witty retort to an insult or criticism. Another definition related to this is a "retaliatory maneuver or measure."
 * Riposte will return in the two-part special event "The Heroes' Day".

Concept art
Kagami Tsurugi Kagami Tsurugi