Nina Mercury ニーナ・マーキュリー

Rail Claymore's secretary and a member of the intergalactic police force. Kind and polite to all, she becomes friends with Millie later in the series. She's shown to be air-headed and clumsy, constantly spilling the coffee on Rail that she makes for him, and can destroy and short-out electronic devices just by touching them. It was also said that Nina is the only Galactic Guardian that can speak the strange language of the people on the planet that worships chickens.