Shiny Pink of the KiraDeco 5, heroes who save the world. A middle school girl from Saitama Prefecture. She is skilled at decorating and acts as a hero to protect her future of becoming a charismatic high school girl through KiraDeco. She recognizes Ruby's unique deco style, becomes her friend, and they begin living together.

Burning Red, the leader of the KiraDeco 5. From Gunma Prefecture. A hot-blooded middle school boy full of courage. He loves training and working out. Extremely positive with no apparent weaknesses. Midori's older brother.

Blue Knight Blue, the handsome one of the KiraDeco 5. His name is written as Blue Knight but read as Blue. He felt a sense of emptiness in his popular life as a handsome idol, but coming to Jewel Land marks a major turning point for him.

Smart Green, the youngest of the KiraDeco 5 and Retsu's younger brother. He feels suffocated by the affection of his powerful and intense older brother. His goal is to achieve great deeds as a hero to surpass his brother and overthrow his position. Seeing the powerful magic of Labra and Angela, he tries to use them for his coup... but everything ends in failure.

The heavyweight of the KiraDeco 5. Slow Life Yellow from Hokkaido, who loves nature and peace. He is kind-hearted, strong, and a big eater. An all-around gentle boy who can do anything from cooking to cleaning. He even happily eats Sapphie's failed cooking attempts.

Sapphie: A Cavalier King Charles Spaniel girl. Her jewel eyes are Sapphires. Intelligent and studious. Though quiet, she is reliable in times of need. However, she is a bit clumsy. She becomes close with Kiichi and lives with him. Garnet: A Persian cat girl. Her jewel eyes are Garnets. She loves fashion, acts maturely, and lives a celebrity life in a mansion. She makes Blue, who came from the human world, her butler. Ruby: A Japanese Hare girl. Her jewel eyes are Rubies. An energetic, curious, and clumsy girl. She loves decorating and runs a shop called "Kira-Kira Ya." However, her sense of deco is poor. She is best friends with Pink. Labra: A Polar Bear girl. Her jewel eyes are Labradorites. She possesses strong magical power but cannot use it well because she is a baby. She is a town patroller and works as a home-based police officer in a duo with Angela. Since the town is peaceful, her job is mostly just walking around. Angela: An Alpaca girl. Her jewel eyes are Angelites. She does things at her own pace. She works as a home-based police officer with Labra. Usually gentle, but scary when angry!? Like Labra, she is an unfathomable being with hidden magical power.

One of the Four Heavenly Kings of the dark organization "Decora Nine." A handsome blonde human from Saitama Prefecture, just like Pink and the others. Unlike Coal, he has a calm personality. He researches the personalities and weaknesses of each KiraDeco 5 member before acting, and he spares no expense in using money or dark magic for his plans. He is desperate to lure Guest to the enemy side, but is ultimately found out by Retsu and Blue.

Coal: A Capybara with coal eyes. A member of Decora Nine, a dark organization working to shroud the world in darkness. He was sent to Jewel Land as an assassin to pursue the KiraDeco 5. He calls himself the beautiful Dark Angel of jet black, but his true nature is shrouded in mystery. Io: Appears as Opal's servant. A so-called "masochistic character" who finds joy in being treated as an errand boy. Opal: A haughty and proud young lady character who ends her sentences with "-ttara." She keeps Io as a follower and stands as a rival to Ruby and her friends. Tour: Thought to be a minor character, but is actually a member of the Decora Nine's Four Heavenly Kings. Dian: Appears as one of the Four Heavenly Kings of Decora Nine and opposes Ruby and the others. Like in the first series, he comes with a kotatsu. Kohaku: The strongest duo of the Four Heavenly Kings (Tour and Kohaku) from the rival organization "Decora Nine."

Guest's partner. Individualistic and Sarcastic: Shows a somewhat cynical and shadowy side, such as teasing human characters (like Pink) when they are troubled by not having a partner at events like balls. She will make clothes for Guest even without being asked.