Gender: Male Personality: Active, cool, and cheerful. - Grey and red striped T-shirt. - Black pants. - Grey and red striped cap. - Headset. 20 years old. (Poyo's older brother.)

Gender: Male Personality: Bright. - Orange short-sleeved shirt. - Orange cone hat. - Black pants. (Ruyo's younger brother, and Ruyo's shadow.) 8 years old.

Gender: Male Personality: Active and slightly mischievous. - Black shirt and orange jacket (sleeves are white). - Glasses. - Brownish-orange hair. (Finds Mocha a bit annoying but doesn't think she's bad.) 20 years old.

Gender: Female Personality: Active. - Beige clothes. - Brown skirt. - Black ribbon. - Brown hair. - Thin glasses. - Obsessed with Karu (not excessively). 20 years old.

Gender: Male Personality: Active. - Muscular (no visible abs). - 3rd year of working out. - Dark turquoise hair. - Blue Valkyrie hat. - White shirt. - Sky blue outer garment. - Navy pants. 20 years old.

Called Econ. Gender: Male Personality: Active. - Blue shirt. - Black short-sleeved outer garment. - Brown hair. 20 years old.

Gender: Male Personality: Active. - White shirt. - Black and green mixed outer garment. - Green headset. - Black pants. - Green and black mixed cap. - Smartphone addict. - 1.5 visual acuity. - Carries two phones. - One phone is for temporary use and is rarely used. 20 years old.

Gender: Female Personality: Active, gentle, and kind. - White shirt and pink jacket. - Light blue jeans. - Light pink ribbon. - Wealthy. - Pink hair. - Extremely beautiful. - Pink crossbody bag. - White cat beanie. 20 years old.

Gender: Female Personality: Bright (was bullied in the past, but has now recovered and has a bright personality). - Grey scarf. - Grey hair. - Black hat. - White T-shirt. - Grey outer garment. 20 years old.

Gender: Male Personality: Cheerful, kind, and cool. - Has a black skateboard (blue wheels). - Sunglasses. - White cap (with floppy rabbit ears attached to the back). - White shirt. - Denim jacket. - White crossbody bag. - Black eyes. - Black hair. - Very handsome. - Takes good care of others. - Good voice. - Good at cooking. - Even more handsome when he takes off his sunglasses. - Wears sunglasses for style, not because of vision problems. Likes: Blue, night sky, the sea or Han River, cool things, stars, navy, night sea, Sera. Dislikes: Nothing in particular. (He likes Sera. In the past, when Sera was suffering from domestic violence and school bullying, he helped and comforted her. When Sera was a child, crying alone at the playground covered in bruises from domestic violence while building a sandcastle, he called out to her, "Sebyul~ it's going to get dark soon, let's go home." Seeing her bruises, he said, "Who bullied you? Those bad guys. I'll teach them a lesson!" and then asked, "Huh? Are you crying?" "Hey, if you cry, you lose." He gave her candy and said, "I'm here. The fact that you're a good person will never change, and never give up on your dreams." He reached out his hand to her. They created a distress signal together. If Sera says "Sandcastle" as a distress signal, they agreed to help each other.) (Note: "Sandcastle" is not a nickname or a name, but a distress signal only between Luke and Sera.)