Hanji Zoe is a Squad Leader from the Scouting Legion. Hanji conducts research on Titans.
Hanji is very passionate and driven in pursuit of new knowledge. She can be seen as very hyperactive, often diving into projects without thought for personal safety (and frightening lots of her subordinates in the process), instead preoccupied with observing and documenting their subjects.
Hanji Zoe is read and spoken about almost unanimously as a female character in Shingeki no Kyojin fandom.
While Hanji Zoe is not a character with a canonically stated gender or sex in the manga, she is depicted as female in the anime and live-action adaptations.