For non-social protagonists, there is the loner tag, which is defined as: This tag is to be added if the protagonist of a series is referred to as a loner by the author. Here, loner refers to someone who is generally not social. Note that this is not the same as Anti-Social Protagonist tag. So if antisocial were to be redefined as "someone who is generally not social", I think it'd be redundant and create superfluous overlap with the loner tag. If the antisocial protagonist definition is wrong, then I'd suggest just merging it with the loner tag. If it's right, then I suggest renaming it to sociopath protagonist to avoid confusion.