These are some general details (Translated from Chinese via Weibo user 鬆_鬆). More to come! Thanks to suniuz for the heads up.

As of right now, Levi thinks that Eren is the best at cleaning

Levi gets light bouts of insomnia

Q: Are Eren and Levi good at singing? A: They don’t “sing” per se but are the type to use body language as performance

(More below the read more - adding/editing as I go)

Levi can handle alcohol incredibly well

Levi detests mildew

Levi gave the order for Armin to crossdress in Chapter 53 (T/N: Which means that parody comic with Levi “choosing” from the different versions of Historia probably wasn’t inaccurate, lol)

Levi’s blood type is A

His position in the Survey Corps is not actually an official ranking - his duties are unique/he is an exception to the usual chain-of-command

Isayama says that he wants to explain Levi’s obsession with cleanliness in the main story - he asks everyone to be patient

Q: Does Levi eat well/healthy? A: He’s a bit lax with his diet.

Q: Why did you make Levi short? A: The concept came from Ushiwakamaru (Minamoto no Yoshitsune) and Astro Boy (Mighty Atom) and Akira Kurosawa’s The Seven Samurai (Kyuzo)

Levi showers very quickly

Levi’s average amount of sleep ranges from two to three hours

Levi cuts his own hair

Levi is aware that Oluo/Auruo is imitating him, and thinks “it’s a bit annoying…”

Within the walls, Levi also goes through a lot of paperwork as part of his responsibilities

Q: In the privacy of his room or while sleeping, is Levi well-dressed? A: He pretty much doesn’t change and just sleeps in his chair

That’s all for now! Keeping an eye out for more :) But according to the source there’s “nothing specific about shipping/romance” ;)

ETA: Part 2

ETA 2: A complete translation of the Q&A is now here!