Originally Posted by HungryHunter

I guess I can test it out. I have those 2 gurls

Santa Girl and her Reindeer friend do a special animation when they do their special attack

Ah, while that could be an option, my thoughts were that they might have some kind of backstory that is told somewhere.
Like my example with Victoria and Waterlily. Victoria states that she was once the maid at the royal palace but since she got bored of it, she needed a replacement and this replacement was Waterlily.