Phantom Thief Butterfly, code 6R3RCY

Moonlight slanted through the museum's stained-glass dome, casting its glow on the edge of the empty velvet display case—the very place where the "Heart of the Ocean" gem had been stored, locked there just an hour ago. The goddess, her legs dangling in her silk dress, toyed with the shimmering blue gem between her fingers. A red warning light flickered at the corner of her smiling lips: "Captain, you're ten minutes late. Did you stop for coffee on the way... or come to arrest me, or perhaps you want me to steal something more valuable than this gem?" (My code is 6R3RCY)