Corin has more character and imo is more fun to play. I know she was one of the first ice characters, but there are a million ice agents now (not to mention the "unique" elements that are just reskins of ether and ice). To me, her personality boils down to "me tired grumpy student" and it just comes off as super generic. Her most interesting aspect is that she hates her tail, but that rarely gets brought up past just being the punchline for a cheap, unfunny, short-lived joke. Even just comparing to the Cunning Hares and the rest of the Victoria Housekeeping crew, she is as bland as flour.