Here are tropes dealing with forgiving others or sparing others of their wrongdoing. Forgive us if this list isn't long.
- Cruel Mercy: Forgiving someone to make them suffer.
- Cuteness Equals Forgiveness: A character is forgiven for an otherwise serious offense just because they're cute.
- Easily Forgiven: The character is forgiven for their heinous crimes rather too easily.
- Flippant Forgiveness: Forgiving others in a sarcastic and condescending manner.
- Forgiven, but Not Forgotten: When a character forgives another, but is still grudging about it.
- Forgiveness: What the index is all about, and can be a central theme of a story.
- Forgiveness Requires Death: In order to be forgiven for a crime, the character must be killed.
- "Get out of Jail Free" Card: The heroes cut the defeated bad guy a break and forgo his punishment.
- Go and Sin No More: Forgiving others and telling them to atone for their crimes.
- Honor Thy Abuser: When a victim learns to forgive (and respect) their abusers.
- My Fist Forgives You: Forgiving a character by attacking them.
- No Sympathy for Grudgeholders: A character gets called out for choosing not to forgive.
- Punished for Sympathy: A character getting called out for forgiving another for their heinous deeds.
- Restrained Revenge: Someone takes a lesser revenge on someone else in lieu of forgiving them entirely.
- Turn the Other Cheek: Repaying evil acts with forgiveness.
- Welcome Back, Traitor: A party member changes sides only to come back and is received in open arms.