Smart Glasses (知的なメガネ Chitekina megane, lit. Scholarly Glasses?) are a key item in Knights in the Nightmare associated with the scholar Locke. Depending on the story, those are found in a respawned treasure chest either in Scene 11 or Scene 13. The Smart Glasses will be the first item to appear if Meryl and Diora have been recruited from a previous playthrough. This is particularly important in Mellia's stage, where Rivulia's continuous assault has to be taken in consideration.