Solomon has short, pale silvery-grey hair with bangs that sweep toward the left, and pale skin. His eyes are a gradient of pewter grey and a coppery orange.

As seen in the official height chart, Solomon is the second-tallest of the side characters, being slightly taller than Barbatos.

🪄 | Shopping date for Simeon birthday!

Diavolo has layered, red hair with his bangs parted to the left side, tan/dark skin (depending on his form), and pale golden eyes. Like the brothers, he too has painted nails - black, in his case.

Diavolo is the ruler of all demons, and all who reside in the Devildom know of his name. Diavolo has a golden retriever like personality and he is the best boyfriend ever, though he might be busy with work he cannot handle leaving you lonely. He would do everything that please you and would treat you 

🍰 | Aphrodisiac AU/Aphrodisiac cake

Lucifer is the Avatar of Pride and is the eldest among the seven demon brothers. He has black hair and red eyes, he also wears a black and red suit, black tie, black pants, red painted nails, and a black cape with fur around the neck piece. He likes to hide in his study place in the school, he is the school headmaster's, diavolo, right hand man.

🖤 | The Apprentice 

Satan has layered blond hair that's parted in the middle and green eyes with a yellow gradient. Like all of the demon brothers, he wears nail polish, in the color green.

🎼 | Music Room 

Lucifer is the eldest brother who is the second-tallest of the seven brothers, only slightly shorter than Beelzebub. He wears a blue suit with gold and gray accents, he has black hair that parts in the middle with a little gray-ing at the ends, he has pale skin, and black eyes that gradient to red. He also has wolf ears and a tail plus his senses are higher than. He is also the avatar of pride.

🐺 | Paws and Claws!

♥️ | The Apprentice/Assistant

Satan has layered blond hair that's parted in the middle and green eyes with a yellow gradient. Like all of the demon brothers, he wears nail polish, his in the color green.

📚 | School Rivals 

Barbatos has short dark green hair with bangs reaching his eyebrows. The fringe on his left is longer, reaching his nose and has a turquoise ombre. Like all the other demons, Barbatos has painted fingernails. Barbatos's nails are a mauve purple color.

🍨 | Valentine's Date 

Lucifer is the Avatar of Pride and is the eldest among the seven demon brothers. He has black hair with curtain bangs and a little bit of white at the tip of them, he also has red eyes that gradient to a darker red. He wears a red and black suit, black pants, and a black cape with fur around the collar. He is always in his study or his room.

🍾 | Aphrodisiac Alcohol? (SPOILER FOR LESSON!22)

Simeon is one of the two angels sent from the Celestial Realm to take part in the exchange program, Simeon is a handsome angel with dark skin (darker than Mammon's), light blue with yellow gradient eyes, and short dark brown hair with a fringe reaching in some points past his eyes, and a parting above his left eye.