[Why are you people being so unhelpful. Someone might actually have hypothermia, here. The MCU world's foremost expert on being frozen, to the rescue.]
Get person out of cold clothes. Get them into warm clothes. Yours, if you can, since they will be warm with your body heat. Wrap in blankets on a bed or chair, off the floor. Limbs curled in towards center of mass. Near a fire if you can make one catch or have a spell for that. Warm drinks if they can drink. Lukewarm water bath (not hot) if they can't drink. Share the blankets with person to share body heat.
[Most of that... was not applicable to cryofreeze. But they know it anyway, apparently. Useful.]
exercise? blankets? hot chocolate? are you okay? how frozen are we talking here
[ He's pretty sure he knows who this is (@ jtodd, whoever you are, he owes you for leaving that snippet of conversation open) but it seems like some people are all right with helping Vanitas, despite what his memories show of him. Riku seems to trust him too. He can't be all the way bad, right? ]
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