This is my headcanon dump for Attack on Titan (Shingeki no Kyojin)
Levi cleans because he is allergic to dust and sneezes like a girl around it.
Levi is claustrophobic.
Levi is French.
Levi's mother died when he was eight, after that he slowly became the most feared person in wall Sina.
Levi has wings.
Levi loves wine, but hates to get drunk.
Levi has a lot of scars, especially on his back and chest.