Seph's look actually changes slightly seasonally, but year-round her staple traits include light pink skin, violet eyes, and blonde hair parted and styled into an eternally anachronistic bouffant. She wears exaggeratedly long, spider-like eyelashes, dark colored purple or black lipstick, and a diamond necklace sculpted into the shape of a small skull (a gift from her husband), regardless of the time of year. She is 6'4" tall.

During the spring-summer season, Seph's hair is naturally curly - it's a shift that physically happens whenever she steps topside. To appease her mother, she tones some of her makeup down into a subtler smoky eyeshadow, and dresses in light colors.

In the fall-winter season when she returns home, Seph's appearance changes upon immediate descent underground, as she is chthonically enmeshed as the Queen of the Underworld. Her naturally wavy hair turns pin-straight, and upon her extremities (the tips of her fingers, the helix of her ears) her skintone darkens into the signature Underworld shadowy black. While in the Underworld, Seph restyles her look closer to the traditional Chthonic trend and the way she prefers, with heavy black eyeshadow and eyeliner and dark-toned clothes, usually an array of chitons and robes in black, gray, or even deep navy blue. Her crown is an arch of jutting black spikes.

Her signature chiton pin is a pomegranate or a skull.