The emblems in the court scene are the sigil for the Crimson King from Stephen King's "Dark Tower" series.
Glenn (Greg Kinnear) quotes Julius Ceaser to Lloyd (Nat Wolff), "The fault, dear Brutus, is in our stars not in ourselves." Nat Wolff previously starred in the movie adaptation The Fault in Our Stars (2014), which took its name from this quote. Series creator and executive producer Josh Boone also directed that movie.