Since you all liked Lillie so much, we've decided to include three Lillies in Ultra Sun and Ultra Moon.

The first Lillie will be Ultra Sun and Ultra Moon's very own Lillie.
The second will be the Lillie from the original Sun and Moon.
And the third and final one will be the Lillie from the Sun & Moon anime.

The other two Lillies arrived in the world of Ultra Sun and Ultra Moon via Ultra Wormholes.

A major plot point will be finding a way to return the other two Lillies to their homeworlds.