Lusamine is the president of the Aether Foundation in the games Sun, Moon, Ultra Sun & Ultra Moon, and just like Maxie, I really love her character design. I also love finding out down the road that Lusamine is the mother of Lillie & Gladion. As far as battling goes, I'd consider Lusamine to be somewhat tough, but not the most challenging leader out there. Lusamine has team of Clefable, Lilligant, Mismagius, Milotic & Bewear in Sun & Moon, which are a couple battles against her in those games, where the second battle Lusamine's pokemon gets an aura boost that boosts one of their stats a little. As for Ultra Sun & Ultra Moon, Lusamine has team of Clefable, Lilligant, Lopunny, Milotic & Bewear, and there's just one battle against Lusamine in those games. Both versions of Alola though, Lusamine will still open up a wormhole for Nihilego to show up, leading you to have to defeat an Ultra Beast after the second island. Overall, Lusamine is a great villain & character, but the top three just do their job as leader better, so she had to get fourth.