In Episode 08 while Kovacs is sitting on the couch you can see a picture of what looks like a giant devouring someone by the head. It can't just be a coincidence, it's clearly an Attack on Titan reference! I took a print:
The painting is "Saturn Devouring His Son" by Spanish artist Francisco Goya. It depicts the Greek myth of the Titan Cronus eating one of his sons. Although I did spot the painting I did not make the Attack on Titan reference.... You are so right! And now, consider that Reileen Kawahara, who stands before the painting, and regarded by Mr. Leung as a god, or Titan, is metaphorically trying to devour her brother.... just a thought.