[Shujin]

I disagree about it being not thematic at all. Verglas/people from Hyoya are stronger in a region of snow and ice.
Expand ice is currently the one single thing that even benefits from ice tiles (minus normal Icicle spear having more range). Giving you the option to take away your offensive, a bit by instead using it for defensive is pretty cool and thematic.

The worry about it only curing Celcius/Frozen is once again...Its simply too niche to cost a skillslot/Skill points. I certainly wouldn't get it just for that even on a dodge that is much more terrified of Frozen. I probably rather just 7M guard or something with Ice point guard. For that the rest of the kit is just too good. And the skillpoints/Slots too tight.