"You know, Marinette? That whole heart-beating, tingling, knees trembling thing? I felt all that from you. You're the one blushing and stuttering and saying silly things every time that you see Adrien. You're the one who knows his schedule by heart for the next three years. You're right, Marinette. Adrien is perfect. He's perfect - for you."-Kagami to Marinette, "Mr. Pigeon 72"

Kagami Tsurugi (剣 かがみ, Tsurugi Kagami in Japanese order) is one of the two tritagonists (alongside Luka Couffaine)