Rime

Rime is an ice demon who was transported to this universe from another dimension by a powerful mage. They were summoned one day by Erris, Arrow and Artemis, who really didn't expect to summon an actual demon. They shortly befriended the human trio, and occasionally is summoned by them to hang out and have fun. As a Frost Demon, Rime has control over ice. They love to play pranks, such as freezing someone's drink. They love Halloween as they can walk around in public, and people only think they're just someone in a costume.