Donnie (rottmnt)

While he is very adept when it comes to intellectual studies, Donatello is autistic, as confirmed by the creator, and demonstrates low Emotional Intelligence. This means that he struggles with understanding certain basic human emotions, in reacting appropriately to those emotions in others, and in controlling and managing his own emotions. This does not mean he feels nothing, but that his emotional experiences are very different from the average person. Donnie values blunt honesty, and hardly ever lies. When he does lie, he's uncomfortable with doing so, being a very poor liar. And while not as innocently naïve as Mikey, he takes people and their actions at face value, which makes him easy to manipulate.