Who do you want to voice Della when she shows up in person?
I think Russi Taylor would be a fun choice. She's the traditional VA for the nephews, so that would be a fun casting gag. Not that I'm saying she'd use the same voice for Della as she would for the boys.
>>94750495
NOT Grey Delisle and NOT Tara Strong. One of those is a great person, but both are overused as fuck.