As of right now, Vincent's been dropped from the story. However, Kika, his cat familiar thingy, will stay, and will be linked to Aurora instead. Added after 2 hours 27 minutes:
Here's a new colored pic of Aurora. She has a very sweet personality to contrast Kurika's somewhat hostile attitude. She's kind, cheerful, friendly, and even sympathetic towards enemies. She's a white mage, with the Elementia Stone in her forehead giving her astounding healing and shielding abilities. Her hair color looks different depending on how the light hits it. To reflect this, I used a mixture of pale blue, pink and purple in her hair. It could be best described as "transluscent".
Aurora likes flowers, animals, and such. Whereas Kurika is more tomboyish and can be considered cute, Aurora's more feminine and beautiful. Even though she looks much older than Kurika, she's 18, while Kurika's 17. Despite all of their differences, they become best friends quickly.
Obviously, she's no fighter. However, she's not completely helpless, and has a few tricks up her sleeve.