Haha I see that you do now that I look at your gallery, so many adorable babies!
So based on ages, Dervla is the same age as your little Princess Laureline so they could be friends!
I imagine, if they end up getting along, Dervla could be an insistently encouraging friend to your girl when she's sad which might be cute. Dervla is also rather close in age to Belladone and Linnet (both of whom I think Dervla could easily be friends with as well, or she could rub them the wrong way as well if we'd want to go in that direction), and Ludwig (who I could totally see Dervla bugging xD). Those are the royal GM characters of yours closest in age to her, though she is bold enough to approach just about anyone so whatever you prefer!
Any of those options sound fun to you?