The Avatar is a spiritual entity that embodies the spirit of light, balance, and peace. It's a fundamental principle of the show that the Avatar is always meant to be a force for good.
Here's why you might be getting confused:
* The Fire Nation: The Fire Nation, particularly under Fire Lord Ozai, sought to control the world through force and aggression. This often put them in conflict with the Avatar, leading some to view the Avatar as an enemy. However, the Avatar's actions were always motivated by upholding peace and balance, making them the true hero.
* The Avatar's past lives: The Avatar is the embodiment of all past Avatars, meaning they hold memories and experiences from previous lifetimes. While these past lives might have made some mistakes or faced challenging situations, their overall purpose and intent was always rooted in goodness.
There are no cases in the show where an Avatar actively seeks to harm others or embrace evil. The Avatar's spirit is fundamentally tied to harmony and light.