Leona (レオナ), also known under her extended codename Leona Heidern (レオナ・ハイデルン), is a character introduced in The King of Fighters '96 as the new member to the Ikari Warriors Team. Her official nickname is The Silent Soldier (サイレントソルジャー).

Aside from the main body of The King of Fighters series, Leona is also featured in a one-shot chapter in the spin-off manga, The King of Fighters: Kyo and has her own character image album.