You know it's said that Cirno is such that she can't melt.... but I know this is played for laughs.

i dont think cirno can melt its not like she is made of ice t-t

its like saying that yuuka its made of flowers D:

Faces in last panel look like comedy-tragedy masks...okay, just tragedy masks.

Even if she melts, she'll just respawn the next day. She's invincible in that manner. :P