I'm tempted to have Della Duck Outed As A Voidtrekker! Which means she will be on the run, trying to avoid getting caught while finding her friends. She still has chunks of her memory missing, but she knows this place Isn't Right and is determined to help others.

That said, she'll risk being captured/etc when there's danger and she can help people fight off loose zoo animals and such. I'm also open to Della being forced to reluctantly fight former friends/trying to convince them she's not a bad guy!