Perl the robo died in the night. She'd been looking very old and frail for the last few days. We adopted her last year because she was being beaten up by another hamster, and their owners didn't have room to separate them.
She lived with Ruby (aka Little'un or Babykin) for a while. When Zosima (Little Silly) died, leaving Alysia (Big Silly) on her own, we put the three girl robos together.