007n7's adopted son. Since he is only a ten-year-old boy, he often does strange things or makes outrageous statements, leading 007n7 to stop him. Because 007n7 is a former hacker, Cool Kid uses inherited hacking skills and once blew up a pizza parlor without any malice. Pure-hearted.

Read as Zero-Zero-Seven-N-Seven. Often called by nicknames like Zero-N or Zero-Seven-N. Male. In his 30s. He stops Cool Kid with all his might when the boy tries to do something crazy. A former hacker. His reactions to surprises are hilarious.

A girl. Her age is unknown, but she looks to be in her 20s. Marisa Kirisame calls her Reimu. Conversely, she calls Marisa by her name. She uses feminine speech. She plays the older sister role. Occasionally fools around. She can fly. She can use "Spirit Sign: Fantasy Seal," which fires a massive amount of light bullets. It is unclear if she likes Marisa romantically.

Male. 20 years old. He is a good scientific partner to Krooker, and they occasionally go out for drinks. He has absolutely no romantic feelings for Krooker. A total extrovert.

A girl who, like Reimu Hakurei, looks to be in her 20s. She has a frank, no-nonsense personality. She came from Gensokyo (a remote mountainous region somewhere in Japan). She can fly on a broom. She can use "Love Sign: Master Spark" (a laser-like attack), but since using it causes a disaster, she usually refrains. She wears a large black and white hat, a black vest, a white T-shirt, a black and white skirt, and yellow buttons on her vest. By the way, she is the most sensible person here; while she enjoys playing the straight man to Reimu's antics, there are so many people to correct this time that she's exhausted. Therefore, she focuses her corrections on Reimu. It's clear to everyone that she likes Reimu as a partner, but it's unknown if she likes her romantically.

Male. 19 years old. Attends FPE High School. Most of what he says consists of dirty jokes. His right hand is a pencil. He likes teasing people and listening to classical music or songs with dirty lyrics. However, he seems to be a bit uncomfortable around women.

Male. 20 years old. He is Garnold's partner, but there are no romantic feelings involved. During the day, he is quite sensible for this group. Before late night, he might offer corrections while looking at research papers, but once it gets late, he starts making dirty jokes and failing at puns, losing his mind to late-night hype. He is the craziest during the late hours. He was once stopped by Garnold while doing a Bon dance naked in the middle of the night.