Nina Mercury  

, ニーナ・マーキュリー

The secretary of Rail Claymore, a member of the intergalactic police force, is kind and polite to everyone she encounters. She later befriends Millie and despite her air-headedness and clumsiness, she becomes an integral part of the team. Her ability to make coffee for Rail and destroy electronic devices with just a touch has made her a valuable asset. Additionally, Nina is the only Galactic Guardian who can communicate with the people on the planet that worships chickens due to her unique language skills.