We disliked MiM ever since we've seen him in RotG, and after reading the books our dislike of him only deepened. The reasons for that deserve a separate post, but today we'll focus on Nightlight.

Even though Nightlight thinks he and MiM are friends, they clearly couldn't have been. His existence had been kept a secret, so the only people he knew were Lunanoffs, sleeping toddler MiM, and Pitch. But then a little girl flew up the clouds and drew his attention, and Nightlight was never the same. The way their relationship deepened and blossomed, we only expected that the natural conflict of loyalties will arise. That it would look even worse after previous biggest Golden Age hero fell to despair because of having second loyalty. Or simply because lonely MiM might be jealous to share his only "friend" with anyone.

The books hinted that Nightlight was developing a personality thanks to his relationship with Katherine. In our version, it also makes him grow and makes his light dimmer. Since no one Nightlight ever did anything like that, Katherine gets scared and distances herself from him. Both suffer.

Jack gets into this mess from Katherine's side just because he's a disruptor by nature, honestly, and doesn't like any kind of forcing people into loneliness. And from Nightlight's side, Moonbeams do their best to distract him from heavy thoughts. Pretty much like that.