Congrats 
She is in this thread:
Costumed Francine - 5* Nature/ Green from Return to Morlovia (Halloween)
I have her without costume maxed and emblemed, hit-3 paired well with evelyn, same mana speed fast with great result.
The costume is even better, because she has elemental def down like Evelyn (HOTM) or Almur (S3 epic), she can be your best slot in blue titan team. I still use her without costume in my blue titan because of high attack stat though.
In Raid annd war the cleanse is very valuable.