Essentially, yes! I think this might be another case-by-case basis, and I'm absolutely open to working with players to find out how best to proceed with undead characters and working through specifics, as no undead are completely the same.

But generally-speaking, while undead characters would be more 'static' in terms of sleep or food needs, similar to the likes of Androids, he would need to take care with his body concerning things like frostbite, or receiving injuries, yes. Or maybe he'd sink like a stone in open water due to the lack of air in his body, for another example.

If you'd like to go through things you're welcome to message me!