To be honest I had to reread the ticket portion a couple times cause I was a bit confused, but that’s just a me thing lol. I understand that Karen bought two tickets, but I’m just wondering: Was there a reason Karen bought a ticket for herself in that moment? Why not wait till the Returner punched Sakura’s ticket, killed her, and then buy her own? Was she planning on running away the moment the clock hit 6? But if that’s the case, I assume she’d already be at the station ready to leave with a brand new ticket, since Sakura definitely would’ve died without her new friend.