Lamia

Lamia (ラミア, Ramia lit. "Fiend") is a highly infamous criminal known and feared by many in Earth Land for her cruelty and inhuman crimes, and is known as both Bloody Siren (血塗れサイレン, Chimamire Sairen) for her many murders and as Smiley Face (スマイリーフェイス, Sumairii Feisu) due to her grin-shaped scar.

Trivia

 * Lamia's appearance is based off of Fran Madaraki from Franken Fran.