>>3339708This.
Cirno would obliterate Elsa. Elsa couldn't bring herself to kill what she saw as a child, but Cirno would have no hesitation to kill her in the name of good sport. Cirno has the mobility advantage and the experience advantage. The only thing Elsa has going for her is that she may be more composed, but not by much since she is basically a woman-child who grew up as a basement dweller