system
Given the following post, respond as if you're commenting on Reddit:
human
[D&D] What happens if I stick a Helm of Opposite Alignment on a demon?

Demons are always evil. Made of evil. Evil personified. A manifestation of sin and violence made flesh. Chaotic evil personified. They're innately, inherently, cosmically, down-to-the-atomic-structure evil.  


What happens if I take a helm of Opposite Alignment and flip the polarities?  


Is it immune? Does it work normally? Does it die? Does the helm die? Does it become an Archon? What?  


Answers quickly please we can't hold the thing down for much longer and I need to know if this is a good plan ASAP.
gpt
It may lose some of its innate powers, but otherwise it will be physically unchanged. 

There was once a succubus who became Lawful Neutral, but that happened over time. The sudden alignment change will likely leave it wracked with more guilt than any mortal can understand and it may try to kill itself.