Fan Casting Self-Made Orphan in Sort by Tropes

What might be considered the inverse of Offing the Offspring, and is equally aberrant behavior, is when a character murders their own parents. Any character behaving this way will probably be Ax-Crazy and/or a Psycho for Hire. An Evil Prince or princess can also do that if they’re impatient enough. It's the ultimate mark of an Enfant Terrible, Antagonistic Offspring, Adult Hater, or the Abusive Offspring, the end result of a Betrayal by Offspring, and a likely origin of an Evil Orphan (who may also be abusive).