A liar and stupid; Mel's just checking off all of the right boxes here. Not that's aware of what Samuel thinks.

"He taught meteorology, so I helped grade things. That wasn't exactly a subject I was well versed in, but I assisted where I was able. Brought him meals, kept him hydrated." She slightly chuckles at this, because Ryūō was a water dragon. "I also taught Italian on the side to students who were interested; ah, that's a foreign language." Since Sam hadn't known Greece, Melinoë offers an explanation as a courtesy.