Age: 19 Ruby's form after transformation. She is a highly capable individual who can transform into various professions and solve any problem with the knowledge suited to each job. No matter how much the villains interfere, she completes today's mission at all costs. (There is a bit of a romantic spark with Spinel.)

Age: 17, Prince of the Kingdom of Meolguna. The Little Prince's original form! He can regain his original appearance while transforming into various professions for missions. As he solves various missions with Sofy, his heart is gradually growing. (A bit of a romantic spark with Sofy.)

Prince Spinel under a magic spell. He appears to be 7 years old. He was originally Prince Spinel of the Kingdom of Meolguna, but because he was so ill-tempered, the King and Queen asked a wizard to "fix his habits," which was the start of the curse. The wizard Shard turned Spinel into a child and trapped him inside a sketchbook, which Ruby discovered! Now he lives with Ruby, bickering with her constantly.

The fairy of the Wish Diary and a mission guide who delivers the day's mission to Ruby and Spinel. Once all the mission clear stamps are collected in the Wish Diary, Prince Spinel can return to his original form. It looks like an ordinary diary on the outside, but it's a secret that it's more sensitive than humans.

Age: 13. A student at Yellow Moon School. Ruby's precious friend with brown hair in a ponytail. She is a girl with an excellent artistic sense who loves drawing and making things. She painted a wooden doll she bought at a store, named it 'Dudu,' and cherishes it like a friend. After learning Ruby's secret along with Vivi, she gains the ability to transform.

Age: 13. A student at Yellow Moon School. Ruby's precious friend with purple hair. She is a cute and lovely girl who loves taking selfies and wearing sparkling accessories. She is eccentric enough to ask her jewelry box for its opinion when she can't decide which accessory to wear. After learning Ruby's secret along with Artti, she gains the ability to transform.

One of the fraternal twin siblings, a disciple of the wizard Shard, and a livelihood-driven villain. Although they jumped at Shard's offer to give them money, their skills are far lacking compared to their motivation, leading to repeated failures. They live through sorrowful days, even having to work part-time jobs because Shard doesn't pay their salary.

One of the fraternal twin siblings, a disciple of the wizard Shard, and a livelihood-driven villain. Although they jumped at Shard's offer to give them money, their skills are far lacking compared to their motivation, leading to repeated failures. They live through sorrowful days, even having to work part-time jobs because Shard doesn't pay their salary.

"The throne of the Kingdom of Meolguna will soon be mine. Mwahahaha~!" A wizard of the Kingdom of Meolguna. He was originally in charge of Prince Spinel's education, but he plotted to usurp the throne by trapping Spinel in a magic sketchbook to become the successor. However, he never expected Prince Spinel, who was supposed to be trapped in the magic sketchbook, to emerge back into the world thanks to Ruby! Now, the only way left is to stop Ruby and Spinel from completing their missions at any cost.

Princess of the Cubic Kingdom. She came seeking revenge because of a memory of being severely insulted by Prince Spinel as a child, but she eventually assimilates with Ruby and her friends and ends up helping with Prince Spinel's missions. However, her transformed appearance is neither a cool adult nor a cute fairy, but a rabbit?!