No wayyy a new look for Chorus? Her last one will still be icon but this is AWESOME, almost looks like a Leafeon, and it's not just a costume either, she actually is a shapeshifter?
No, it is a costume. She had to compact herself into the costume and wear a mask to keep the tentacles in check, and then later removed the mask to cut them.
If she cuts the tentacles close enough, she'll strike an area where the nerves are extremely dull. Then she can just like... sell them to the sushi black market or somethin.
Technically her entire species are Eeveelutions, but they don't classify themselves as them since they evolve at birth (their planet is made entirely of the evolution stone needed)