As a human, Jack is a slim, fair-skinned young man with an upturned nose and blue eyes. He has somewhat short blond hair, which is neatly coiffed and swoops up on the front right side. His attire consists of an azure and purple vest with a stand up collar; a white, long-sleeved shirt; white trousers; and reddish-brown leather boots. Most of his vest is azure, but the front middle part and the edges of the collar and sleeve openings are purple. The vest has gold, swirling embroidery on the front and two brass buttons across from each other below the collar, which has a purple acute angle on either side. His shirt has slightly puffed sleeves and blue cuffs with white stitching down the sides. His trousers have pockets and a gold, patterned stripe down the outside of each leg. They are tucked into his boots, which stop slightly below his knees. As a dwarf, Jack is much shorter and chubbier, with large, pointed ears and light green skin Personality Jack is a loyal, brave, and narcissistic man who enjoys taking care of his appearance, having a daily skin care routine and always carrying a hand mirror. Having the tastes of a French aristocrat, believes that diamonds are the way to a woman's heart Jack is not easily ruffled by the outbursts of his fellow F7 members however, he does exasperated when Arthur embarrasses himself Like the other members, he initially assumes the goodness of people based on their look

Pino, Noki, and Kio are identical triplets. As humans, they are slim, fair-skinned young men with round noses. Their attires each consist of a brown leather cap pulled down over their eyes, a thick, white button up shirt, yellow leather gloves, dark green jeans, and tan, knee-high leather boots. The shirt is long-sleeved when they are humans, with faint, vertical grey stripes, three brass buttons, and a green stand up collar. The collar's seams and the front placket are dark green. They each wear a brown leather belt with a tan middle stripe and brass buckle around their waist. Their pants have pockets and are tucked into their boots, which have yellow seams and a button at the tops and slightly pointed toes. As dwarfs, the triplets are chubbier and much shorter, with large, pointed ears and light green skin.All of them have grease stains on their shirts (which are short-sleeved and only have two buttons instead of three). Their belts are completely brown. Pino, Noki, and Kio can be told apart by their caps, which have one, two, and three stripes, respectively. The caps all have flat tops, loose-hanging straps, and stitches down the sides.