*Ariem[5] (アリエム, Ariemu?) is a character that appears in the Sonic the Hedgehog series. She is an anthropomorphic horned sheep-like being who guards the Reverie[4] and resides in Reverie Haven. Ariem was commanded by her mysterious "creators" to guard the Reverie, and only allow people she thinks are noble and good-intentioned to use its powers.

Ariem is an anthropomorphic sheep-like being with features similar to that of a ram, with Jordy blue woolly fur on her head for hair, which is kept in a ponytail by a mulberry hair tie, and magenta eyes. She possesses one eyelash on each eye, wheat-curved horns on her head, long-flopped ears with pink canals, and a small purple nose. She also has white fur around her muzzle and between her eyes, a yellow moon crescent on her forehead, and wears bright lavender eyeshadow. Her hands are disconnected from her body and the ends of her legs come to a point with no visible feet.

For attire, Ariem wears a teal and mulberry cloak with yellow and white trims and a galaxy-like starry interior, and white gloves with gold bracelets for cuffs.

Ariem has a strict sense of duty due to being born with a mission, and has a strong moral sense.[6] Despite that, she is calm, collected, and pure, especially around friends, but in dangerous situations, she is ready to help those in need. When Cream and Cheese were captured by Dr. Eggman, she made him fall asleep and gave Sonic, Tails, Knuckles, Amy, and Rouge time to arrive to Eggman's base. She also helped the heroes during their adventure in the dream, guiding them throughout the Dreamscape and informing them of its properties.

Ariem is also hard to fool, as she saw through Eggman's attempts to trick her into making his dreams a reality through Cream's mind.*