Dōbutsu

Dōbutsu is a very powerful ninja who has spent his first 30 years of life mastering the Transformation Technique. He mastered the technique at age 10, but wanted to learn more, so he had spent the next 20 years training with the technique, since he already knew how to fight without the use of the technique. After he finished his training, he had mastered the technique to wear he couldn't be recognised when he had turned into someone else, no jutsu in the universe could be able to identify him. Now, he is 30 years old and participates in the Fourth Shinobi World War.