Characters appearing in ''{{Tantei Gakuen Q}}''. A Work In Progress, any additions are greatly welcomed.

!Kyuu Renjou
* DisappearedDad: He died when Kyuu was around five years old. [[spoiler:He was TheLancer to Morihiko Dan and died in the same incident that rendered Dan crippled.]]
* TheHero
* LoveableSexManiac: Kyu seems to be a bit obsessed with girl's panties. Especially Megu's or Yukihira's
* MegumiOgata

!Ryu Amakusa
* [[spoiler:BecomingTheMask]]
* ChickMagnet: Older women, young girls and ''little girls blush'' at the sight of him.
* KoichiTochika
* TheLancer
* SugarAndIcePersonality

!Kintaro Touyama
* BadassNormal: Not a genius like the others, but he makes up for it with his SuperStrength and utter loyalty
* TheBigGuy
* EyesAlwaysShut
* HideoIshikawa

!Kazuma Narusawa
* {{Megane}}
* NiceHat
* TheSmartGuy
* TomokoKawakami

!Megumi Minami
* TheChick
* CosplayOtakuGirl: In the live action version.
* GirlishPigtails
* HoukoKuwashima
* PhotographicMemory
* RoseHairedGirl
* {{Tsundere}}: Type B. She's a fairly sweet girl until Kyuu comments on her panties or flirts with other girls.