QT3

Model QT377665, or QT3 for short, is the protagonist of Doki-Doki Universe.

Appearance:
Over the course of the game, the player will unlock many avatars, so QT3 does not have a fixed appearance. However, his/her original form, before any customization happens, is a pale blue robot with a semicircle head, long body, circular eyes with no pupils, and simple stick arms, legs, and neck.

Personality:
The game's purpose is to teach the player about their own personality and humanity in general. As such, you determine QT3's personality to a large extent; you decide whether QT3 is mean, kind, or silly by choosing various responses to the characters. However, QT3 does show loyalty (he kept waiting for his family for all of those years, after all) and general friendliness (he is willing to do pretty much whatever the characters want).

Story (SPOILERS):
Note: This is basically the game's story, so I won't be retelling it in the pages for Lani, Balloon, and the other characters involved in it.

Model QT377665 was a model of robot intended to live with humans. QT3 was owned by a little girl, Lani; however, was abandoned, alone with Balloon. QT3 waited on a small planet until Alien Jeff came and informed QT3 that his/her model was in danger of being made into scrap metal due to its lack of humanity. This set the robot off on a quest through the universe to learn about humanity.

He was eventually reunited with Lani on the planet Robodachi, and it was revealed that the factory had decided that QT3's model had enough humanity after all, and would not be recalled. However, they doubted Alien Jeff's humanity. Alien Jeff lied to QT3 so that QT3 would go off and learn about humanity for him. Thus, Alien Jeff only had to listen to what QT3 said at the end of each planet, and file a report.

QT3 had enjoyed learning about humanity, though, and didn't mind continuing. Lani couldn't come with QT3 because her parents, now old, needed her, but she promised to write letters.