Male Leader of Team Chulsoo at the Galaxy Safety Corps Headquarters Human 9 years old Considers Younghee his rival His team currently has the fewest safety badges

Female 9 years old Human Leader of Team Younghee A model student type with a smart and meticulous personality She likes her rival Chulsoo and tries to get his attention through safety badges, his only interest, but Chulsoo is completely oblivious and only views her as a rival Possesses many safety badges

Male Main Color: Blue Black's younger brother A police robot who loves being the center of attention He enjoys showing off and has hobbies like waxing his body or changing hats He secretly cares for Captain Chulsoo a lot He views his older brother Black simply as a rival Member of Team Chulsoo

Male Main Color: Red A fire truck robot with a delicate and gentle personality He has a notebook called the Safety Diary and writes in it without fail His hobby is writing in his Safety Diary (recording daily events without filtering) He becomes as scary as a drill sergeant when angry, but is usually diligent and reliable Member of Team Chulsoo

Male A bulldozer robot who loves dancing and exercising Main Color: Yellow He often tells stories reminiscing about the past, specifically times long before robots were even created For example, he talks about doing things with dinosaurs or mammoths; hearing this, Rookie whispers to ask if robots even existed in that era Member of Team Chulsoo

Female Main Color: Pink and White The only female robot in Team Chulsoo and is in charge of piloting the Galaxy Safety Corps spaceship A helicopter robot who enjoys reading magazines and watching soap operas The eldest member of Team Chulsoo While Blue clashes with his brother Black, she is the one who primarily clashes with Orange Member of Team Chulsoo

Male Main Color: Mint A new recruit robot of the Space Scouts who works hard to learn about scouting from the leader, Chulsoo. Equipped with a built-in phone, a size-changing laser, navigation, and binoculars A Volkswagen Transporter robot A robot that speaks politely Member of Team Chulsoo

Male Main Color: Black A tactical vehicle robot Blue's older brother (he came out of the same factory one minute earlier, which Blue refuses to acknowledge) Unlike his brother Blue, he speaks politely and sometimes refers to Blue by the nickname 'little brother' He has a poor relationship with Blue Member of Team Younghee

Female Main Color: Orange An airplane robot Despite being rivals, she is quite close to Chulsoo and helps him often. She has even gotten angry at him for being stubborn and reckless. Judging by her comment, "Wow, you're speaking well now," it seems they have known each other since Chulsoo was very young