I've only actually played the first game, but as I understand it, NiGHTS is a high-ranking Nightmaren just like the monstrous bosses they fight. NiGHTS happens to be powerful enough to be independent. Whenever the other Nightmaren mug a dreaming visitor, if the visitor keeps hold of one of their Ideyas, NiGHTS finds it more fun to help the visitor wreck everything instead.
Edit: corrected NiGHTS to they/them pronouns (and while I'm here, you can still get the Steam version of NiGHTS for free)
Just make the main link a New York Times gift article link. Those aren't paywalled. https://www.nytimes.com/2024/09/18/world/middleeast/israel-exploding-pagers-hezbollah.html?unlocked_article_code=1.L04.4Yla.tf3LG-_hbGcb&smid=url-share