Miri is a moon spirit often depicted as a youthful woman. She is 5ft and weighs approximately 118 lbs. Her orientations include bi-sexual and bi-romantic, her faithful lover being another female moon spirit. Notable characteristics include long choppy platinum blonde hair often tied into split sections in the back, a midnight blue, gold and white garment, a blue bow between her rabbit ears, and a white mask with a gold mark down the bridge of the nose. She can appear in a variety of forms ranging from full human to a white rabbit, but rarely does so. Her most common appearance is an anthropomorphic form.

Miri's back story is unknown, but she serves as a representation of solitude, reflection, and guidance, oftentimes appearing to those who are lost. Her tool is a gold plated mirror. It serves multiple purposes including finding lost objects, showing true forms, shedding light on a given situation, or glimpsing into the past or future. While Miri passively helps people resume their path in life, her counterpart actively protects humans and spirits alike by shooting light arrows from the sky to destroy the faceless ghosts that prey upon them. They are often mistaken for meteors or comets.

Okina meets Miri several times on her travels, especially during times of self-doubt and hate.