BUR #50267 has been approved by @evazion.
rename pan-chan -> pan-chan_(panda_kopanda)
rename mimiko -> mimiko_(panda_kopanda)
rename papanda -> papanda_(panda_kopanda)
Unqualified Panda Kopanda characters. I'm qualifying Papanda for the sake of consistency as the only other tag similar to him is of artist Papanda64. If unnecessary, I can edit the BUR and remove him.