I had wanted to post these as actual filler pages in between the chapters but I seem to have forgotten to! I’m hoping to make an “Extras” page where I can link to this stuff, but while I’m getting that sorted, here’s the archive of WitS Q&A on tumblr:
Showing newest first! It should be noted that the entirety of old answers may no longer be entirely canonical, especially when it comes to backstory stuff. Anything that hasn’t been solidified as canon in-comic is constantly shifting!! Webcomics are like that, apparently.