Sunmin is a little girl that appears before the end of Ben 10 episode "Merry Christmas".

The reason why the name is 'Sunmin' seems to be the service god provided by the production team of Ben 10 to the Korean animation company called 'Sunmin Image Pictures', which was then the outsider production company of Ben 10. In fact, Ben 10 credits come out with 'Sunmin Image Pictures'.