Female, 5th grade. (12 years old, 11 internationally) She always dreams of getting revenge for her brother's pranks, but playing with him is still the most fun thing to do. After eating a mysterious jelly with her brother, she sets off on a space journey. : She has short pigtails, wears large glasses, and is always seen in an orange hoodie. : She ate the green jelly, and her power is 'Teleportation'. : INTJ - She dreams of becoming an idol with her friend Daisy. (Honestly, it doesn't seem likely to happen.) : Nickname: Tooth Monster : Likes: Imitating idols (not very well) : TMI: Her real name is Han Da-un, but because she wants to be an idol, she uses 'Amy' as a stage name. Her parents and friends all call her Amy. (Except for her teachers.) - Euddeum's younger sister. : Held Jelly: Green Jelly (ate it by accident)

Male, 9th grade. (16 years old, 15 internationally) He is a bundle of curiosity who constantly causes trouble. While trying to prank Amy as usual, he suddenly finds himself on a journey through space. : He has black hair, doesn't wear glasses, and always wears a green short-sleeved T-shirt. : He ate the purple jelly, and his power is 'Temporary Intelligence'. : ENTP - He loves teasing Amy. (This is the one thing he's actually good at.) : Nickname: Green Pig : Likes: Teasing Amy, gaming : TMI: He loves eating and isn't very good at studying. : Held Jellies: Purple Jelly (ate it by accident), Yellow Jelly

Chaos (Dr. Jeong / Earth Science) Male. The Director of Genius Lab. As the leader of the lab, his passion for science is immense. With his brilliant mind, he provides great help to the siblings in finding the jellies. Slightly eccentric. Igloo (Researcher Kim / Physics) Male. The mood maker of the lab. He is playful but a genius capable of whipping up amazing inventions in an instant. Slightly eccentric. Scarlet (Researcher Kwon / Life Science) Female. The lab's problem solver who calmly handles crises in any situation. She can communicate with all living things in the world. Can even communicate with people (?) Twinkle (Researcher Choi / Chemistry) Female. The youngest researcher in the lab. She takes care of the siblings like they are her own younger siblings. She is skilled at creating special substances. Really beautiful.

-Snack Squad- Villains who want to eat every snack in the world. They happened to learn about the existence of the jellies and are now chasing the Science Expedition to claim them. Mr. Choco Male. Eccentric. He has a large build but isn't very bright. Real name: Wang Cho-bo Miss Strawberry Female. The smartest member of the Snack Squad. She has a small build but is very clever. : Held Jelly: Yellow Jelly (ate it) : She ate the yellow jelly, and her power is 'Precognition'. Real name: Cha Bok-hee Cookies & Cream Male. A trained panda. That's why he only speaks in 'Grawwwr grawwwr'.

The dog raised at Euddeum and Amy's house. He ends up joining the science expedition with Euddeum and Amy by accident. He helps the siblings with his animalistic (?) instincts in moments of crisis.