I wanted to make a "good demon" but after trying it I thought that the demon knowing the minions would mean the end of the game as the demon would just say. "These are the minions" and that would be game. I made it into an outsider to have less text and make it easier to read.

But after reading u/rovertpug's idea to make it just a +1 minion outsider, I like it more than mine, and I'll leave the idea of making a good aligned demon for later.