They are born with considerably larger and stronger chakra than their clansmen. They also show similar traits to their previous incarnations, such as how Sasuke has prodigy skills and Naruto was a late bloomer by training very hard to awaken his true power. Both incarnations develop similar points-of-view over their lives, which drives them to conflict. Indra's known incarnations have all be masters of the Sharingan/Mangekyo Sharingan with exceptional skill over Yin Release, and Asura's incarnations have been the embodiment of strong life force and longevity.