>>30442660She just started her journey. And she isn't becoming a trainer to battle you. It so that she can travel with Nebby and you without having to rely on you for everything. Which makes sense. From Lillie's perspective, she is nothing more than a girl who dragged you into her family problems. She doesn't want to cause more.
If she's going to come back every other week, her going away loses all meaning. She was not a trainer. She won't battle you, at least not in this game.
>>30442751Missing ≠ being hurt.
Of course you would miss them, but if they're only going away for a really short period of time, and for good reason, it isn't a big deal.
It's like going somewhere on your Summer Break. You won't see your friends for a while, but you don't cry about it.
Besides, the game had already ended, anon. Her going away or staying doesn't matter. At all.