Taking this as a threat, the other girls decide to evac Kurusu to save his life. But they're not really safe on their own. He's probably in more danger from their help than anything else.
But Lala the Dullahan isn't a Reaper of anything. She's just chunibyo.
Lala decides to stick around to see why Kurusu doesn't die from all the shenanigans. Smith approves; one less troublemaker to keep track of.
Kurusu is having trouble making ends meet. Food costs are up for the size of his large family.