- Disappeared Dad: He died when Kyuu was around five years old. He was The Lancer to Morihiko Dan and died in the same incident that rendered Dan crippled.
- The Hero
- Loveable Sex Maniac: Kyu seems to be a bit obsessed with girl's panties. Especially Megu's or Yukihira's.
- Nice Guy: A pervert he may be, but Kyuu is one of the sweetest characters in the series.
- Ship Tease: With Megu.
- Becoming the Mask: He was supposed to be The Mole of the Meiousei group, as the grandson and spy of the Big Bad. However, his friendship with Class Q made him think twice.
- Chick Magnet: Older women, young girls and little girls blush at the sight of him.
- The Lancer
- Sugar and Ice Personality: He's very cool-looking and almost unhumanly cold at first, but then he begins to show a much warmer side to him.
- Badass Normal: Not a genius like the others, but he makes up for it with his Super Strength and utter loyalty.
- The Big Guy
- Lovable Sex Maniac
- Eyes Always Shut
- "Well Done, Son!" Guy: His father is a highranked police officer, and Kintarou is rather conflicted about this.
- Adorably Precocious Child: The youngest of the group, and it shows.
- Dirty Kid: ... Exactly how did he get such an exact hold of Megu's boob size?
- Nice Hat
- The Smart Guy
- The Chick
- Cosplay Otaku Girl: In the live action version, she shows up un several different outfits.
- Girlish Pigtails
- In-Series Nickname: Called "Megu" by her friends.
- Photographic Memory: Her biggest "gift".
- Plucky Girl: Very strongwilled and always ready to help.
- Ship Tease: With Kyu.
- Tsundere: Type B. She's a fairly sweet girl until Kyuu comments on her panties or flirts with other girls.