Anti-Villain

An anti-villain is somewhat the opposite of an anti-hero. While the anti-hero often fights on the side of good, but with questionable or selfish motives; the anti-villain plays a villain's game, but for a noble cause in a way that the audience or other characters can sympathize with. They may be more noble or heroic than an anti-hero, but the means to achieve their ends are often considered exploitative, immoral, unjust, or just evil.

Anti-villains will occasionally side with their rivals (usually the protagonist) if a greater threat than themselves comes or it's in both of their best interests. Often times, if they do join the protagonists, they are distrusted but can get along and eventually redeem themselves. On the other side of the coin though, is that they are easier to redeem than regular villains. What's more, similar to anti-heroes, the most prominent personification of anti-villains is that they are kindhearted towards their opponents and treat them with equality, but it can be possible for them to treat other villains around them with brashness and rudeness, which is a very unusual trait for such a villain to have. Also, some heroes who were good or normal at first can sometimes become villains after.

In essence, these are characters that, although technically villains, often serve in a noble capacity, which makes them sporadically heroic. It is possible and, in fact, very common to be both an anti-villain and an anti-hero at the same time, depending on the character's goal and their methods of attaining it. They can also be in the center of being in the Grey Zone, depending on their alignment (though an anti-villain is not necessarily in the Grey Zone and can be outrightly evil).

However, Anti-Villains do not necessarily have to have noble goals, as some can simply meet all the other criteria

Alternatively, characters that are meant to be seen as villains in-universe or out, but are not really all that evil, such as certain designated villains or "Punch Clock Villains"