You Died Symbol Reference: Moonlight Butterfly

You Died features a symbol of a butterfly. It’s a reference to concept art found in Dark Souls: Design Works on page 70.
This design was used in the game for the boss enemy Moonlight Butterfly.

Moonlight Butterfly Symbol, page 94

The Moonlight Butterfly symbol is featured in You Died on pages 26, 94, 213 and 339.