Unlike Joker, who takes pride in his skills, Spade takes pride in his appearance and various other talents, showing a narcissistic side. However, this trait is mostly highlighted when he's bickering with Joker; his actual first impression is quite polite and kind. Looking at his actions, while he thinks highly of himself, he doesn't go as far as openly looking down on others. He is deeply affectionate toward those he has acknowledged. If he stays angry for more than 5 minutes, he collapses from a high fever, which often worries his assistant, Dark Eye. He enjoys playing pranks and has been teasing Joker since they were kids, though he usually ends up being the one who gets pranked in return. Most of their fights start because Spade pulled a prank first. According to Joker, Spade never admits to deceiving someone with his own mouth; in the anime, even when he lies to or tricks others, he insists he didn't deceive them, he just didn't tell them. Unlike Joker and Queen, he has the least attachment to family and rarely cries. When their master Silver Heart was in mortal danger, Joker cried, asking who would be their family if he died, and Queen wailed in sorrow, but Spade only held back a tiny teardrop without making a sound. He is the most mature character. After becoming a phantom thief, he overcame his timid and dark past to become cheerful. He smiles more than Joker and has developed high self-esteem. Still, he remains more timid and meticulous compared to Joker. He is currently a 2nd-year student at the Phantom Thief Academy.

The adopted granddaughter of Silver Heart, the master of Joker and Spade. She has a diamond-shaped birthmark on her right hand. She trained in the ways of the phantom thief alongside Joker and Spade during their childhood. Currently, she is active as a fellow phantom thief. A tomboy who doesn't sweat the small stuff. She has a strong sense of justice and often meddles in things that aren't her business. While she's a clumsy cook, she is highly skilled at wielding a sword that is over half her own size, despite her slender appearance. She is stronger and sillier than Joker and Spade. She absolutely loves desserts, especially anything containing strawberries. She is currently a 2nd-year student at the Phantom Thief Academy.

The master of Joker, Spade, and Diamond Queen, and a legendary phantom thief known as the Magician of Silver. He possesses skills worthy of being called a world-class genius thief and invented phantom thief tools like Image Gum and Image Cards. While he seems like he would be serious and cool, he is fundamentally a bit detached and gets annoyed easily. Due to his age, he frequently throws out his back at critical moments. In truth, he thinks of his disciples as his own children, but he's too shy to express it well. Fifty years ago, he wasn't a thief but a secret agent from France, and his parents reportedly died shortly after he was born. The monocle on his left eye is said to cover a blind eye lost during a confrontation with Professor Clover—Agent Clover of the Soviet Union—fifty years ago. He is currently a teacher at the Phantom Thief Academy.

He cherishes his younger sister, Rose, above all else. He has a personality resembling a chic terrorist. He is highly responsible but tends to be gloomy and has 'chuunibyou' tendencies. A mysterious boy who looks exactly like Joker. Because of this, he has a chic, handsome appearance. He favors the laser gun-brella 'Bloody Rain.' While he shares Joker's boldness, youthfulness, and selfishness, he is cruel and cold-blooded. He has low blood pressure and is weak in the mornings. Conversely, his energy seems to spike on nights with a full moon. He has a very foul mouth. However, he can be a warm-hearted character who would do anything for his sister. In fact, he became a terrorist solely to save her. He is a cool individual who will readily help Joker if he's in trouble without expecting anything in return. Once he focuses on something, he becomes completely immersed. In the past, his life's goal was saving Rose, and later, he focused entirely on being Joker's rival. He is currently a 2nd-year student at the Phantom Thief Academy.

Joker's assistant and disciple. A slightly clumsy rookie phantom thief boy. He was born and raised in a ninja village but was dropped because of his clumsiness. He has a laid-back personality but a stronger sense of justice than anyone. Although he has some unreliable spots, he supports Joker properly. He is confident in housework and his cooking is professional-grade. In his first meeting with Joker, he cleaned up the messy interior of the airship in an instant and completely won Joker over with a single serving of curry. He addresses everyone with the honorific '-sama.' He is not yet enrolled in the Phantom Thief Academy and is currently preparing for admission.

A witch who can manipulate time. She is Shadow's younger sister, and her default personality is gentle and kind. She is polite to everyone and loves and follows her brother Shadow faithfully. She is currently a 1st-year student at the Phantom Thief Academy at Shadow's suggestion.