These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Jerk Sue: Tsurugi. He's a director, producer, dancer, choreographer, author, screenwriter, voice coach, and incredibly abusive. Possibly a deconstruction because people close to him come to realize his abuse. Oh, and because he's batshitinsane.
Woolseyism: (End of series spoiler.)During the massive infodump in the 14th episode, Wakagi uses the word "omoi" — Japanese for "thoughts", "feelings" and so forth — to describe the substance Ajo referred to as "Gel". The Viz translation uses the German word "Geist" ("mind", "spirit", and/or "ghost"), which helps get the point of it being Life Energy across.