Kaer Morhen would, by all metrics, be the safest place for Jaskier to be. He had always wintered in Oxenfurt, in the comfort and familiarity of the Oxenfurt Academy, surrounded by his friends and colleagues. He would tell Geralt about it, when they met again in spring, about the songs he'd composed and the nights he'd spent at any number of taverns, drinking and singing until his voice gave out.

Geralt's jaw tightens. He had said whatever you want, but he has a responsibility to Ciri, as well. Leaving her with Vesemir for a time while he went to find Jaskier was necessary, but he couldn't leave her alone all winter to stay with the bard. He couldn't abandon her again, not after he had spent so many years running away from his duties to her.

"Jaskier..."

If he brought him to the keep, Vesemir might not approve at first, and his brothers might not enjoy having another outsider in their home, but so long as Geralt takes responsibility for him, he'd be able to stay. The issue is that there are so few reasons for him to want to-- the company wouldn't be nearly as lively or entertaining as in Oxenfurt, and the library is full of witchers' texts and monster manuals, not poetry. The fortress is aging and drafty, and there are areas of it that are inaccessible from the ravages of time and disrepair. The larders and pantries would be well-stocked, but with food that could last an entire winter, and there wouldn't be any of Jaskier's accustomed delicacies.

"I can't stay in Oxenfurt all winter. Ciri will need me."