The 'Nao Tomori Melon Face' refers to a specific, distorted facial expression made by the character Nao Tomori from the 2015 anime series 'Charlotte'. While Nao is generally known for her stoic and intelligent personality, this particular frame—often associated with a scene involving a melon—captured her in a moment of extreme skepticism or silent judgment. The image gained significant traction on anime forums like 4chan and Reddit as a versatile reaction image. It is typically used to express a sense of 'What on earth am I looking at?' or to mock someone's questionable logic. The meme's lasting popularity stems from the hilarious contrast between Nao's usual serious demeanor and the sheer absurdity of her facial distortion.