Otto is one of the Minions, a group of small, yellow, and energetic creatures who serve Gru, the main character of the 'Despicable Me' series. Known for his round body and braces, Otto is cheerful, talkative, and often distracts from the task at hand with his enthusiasm. In the 'Minions' movies, Otto plays a supporting role, contributing to the comedic antics and misadventures of the Minion group. His innocence and curiosity often lead to humorous situations, making him a beloved character among fans.