U-E No. 13

U-E No. 13 (ウエノ13号 lit, Ueno Number 13) is a reoccurring minor character in Ueno-San wa Bukiyou. She is a robot created by Ueno in her image.

Personality
No. 13 seems to be a copy of Ueno, without her inabition. She tries to confess to Tanaka for Ueno, but is stopped by Ueno. She also told Minamine that Ueno loves Tanaka when asked. No. 13 will do maintenance tasks for the school. Whether this is due to Ueno telling her, or of her own volition is yet to be established, though it's possible her base being a caregiver bot is responsible.

History
No. 13 was created by Ueno to trick Tanaka into thinking the bot was her. She has since helped the science club with other experiments.