Posts depicting characters, who have previously gone through a corruption process, being purified and turning them back to their normal selves. Alternatively, already evil/corrupt to begin with characters being purified of their taint and transforming them into a pure/good/holy/etc. version of themselves.
Purification can also go to an extreme end where the resulting character becomes hyper-puritan, angelic, divine, sickeningly saccharine, or become so purified that they're basically now blank slates.