Sera is a seraphim angel. In her humanoid form, she is described as a tall and slender woman with cedar-brown skin, white freckles, and a white streak down her nose. Her hair is hip-length, curled, and colored in a silver-like ombre. She has white irises, blue-gray sclera, deep-purple pupils, and thick lashes. Sera also has six feathered wings which are pale-periwinkle and white, and two halos, one decorated with large crown-like spikes and blue gem-like circles.