story wise she was created by accident when jeanne alter wanted revenge against santa (who was an evil version of king arthur at the time) for petty reasons, drank a potion to try and steal Santa's sack of gifts to distribute them before Santa could, but steals a potion of youth instead of a potion of invisibility instead. still convinced becoming Santa is a good idea she goes on an adventure to prove she is a proper Santa in her own right.
personality wise she is the bratty younger sister, resembling a younger version of jeanne d'arc more than alter: she is too serious, inflexible, and prone to rash actions. her divergence is that when her actions get her into difficulty she panics and gets flustered easy.
she considers alter to be immature and foolish so they are depicted often at ends with each other
her catch phrase is to declare something "logical" whether or not she understands what's going on or can produce any sort of series of logical inferences to back up her statements, giving her a smug air of a know it all but not the mental acuity to ever back it up
gameplay wise she is nothing too special, but she has a fair mixture of offensive and defensive abilities that makes her useful in lots of situations and team compositions
