艾伦

犯罪组织Inferno（地狱）所属的暗杀者，拥有过人的实力，Inferno赠与“Phantom（幽灵）”的称号来承认其实力。冷静沉稳的美少女。Ein的意思为德文的数字1，纯粹是命名人避免麻烦的缘故。

简介来自 Bangumi

Inferno's top assassin. Like Zwei, she is without a past and calmly follows her orders without question. Apathetic and aloof, she acts as Zwei's mentor as he learns what it takes to become an assassin. Her name means "one" in German. Weapon of choice: Colt Python (.357 Double Action Revolver).

简介来自 VNDB