Tomoe are comma-like marks that indicate how developed the gift of Sharingan is. This dōjutsu is characterized by red pupils and black tomoe. What Is Sharingan?Īs I said, the Sharingan is an innate ability ( kekkei genkai) of the Uchiha clan. But what exactly is Sharingan and what can it do? Read on to find out. Instead, it appears only in some members of the Uchiha clan. Unlike many other skills in the series, the Sharingan can’t be taught. In the manga and anime series Naruto, the Sharingan is a special type of dōjutsu.