Ingenu

Even a casual reader of the philosophic tale will have met, in the array of types on parade-an oft-repeated "naïf" (who was anything but naive), at least one famed "candide," and several "ingénus."

Source: wiktionary

Swift, it might be noted, has used this technique, but with "reverse English." Instead of a fine central intelligence, he has set up at the core of his work his favorite ingénu, an "I" who egregiously identifies himself with the very abuses that Swift is attacking.

Source: wiktionary

The trouble still lies, as it did in the Happy Valley, in the mental ineptitude and moral weakness of the characters. This is the target throughout the story, as mere ingénu and mere academic split time after time on the rock of reality.

Source: wiktionary

You seem pleasant and harmless with your dark ingenu eyes and your nice Midwestern manners.

Source: wiktionary