Well so...
Neuvillette: I see him being a cat person, so a cat with white fur, or... I can see a Sphynx cat for him too. If a dog, it would be a Tazi dog (hello Tanit ~)
Furina: A white Maine coon cat.
Navia: A Ball Python or an Iguana.
Clorinde: An Australian Shepherd.
Lyney: A parrot. Probably a big, colorful one like an Ara. Or a Rainbow lorikeet.
Lynette: An alley cat she adopted.
Freminet: An Axolotl.
Chevreuse: Something really cops-like, a Malinois.

And I don't see animals for Sigewinne, Charlotte, Emilie or Arlecchino.