Milly Thompson (ミリィ・トンプソンド, Mirī Tonpuson) is a fellow Bernardelli agent, and friend and assistant to Meryl. Despite physically towering over Meryl, Milly looks up to her and always refers to her in a respective manner.She appears rather simple, but has a kind heart and also reveals a strength of character and genuine optimism. Milly comes from a very large family, and writes letters to them constantly (known as "The Milly Monthly"). Milly manages to hide a very heavy concussion gun, referred to as a "stun-gun", under her coat. The shots, which pop out into the shape of an X-shaped claw, are so powerful they can even knock over trucks.