[Shiro waits until Darc is gone before dipping his prosthetic into one of the pools and reaching for the memory activating his arm. It's something he's only done in a fight, mostly on instinct. He's vaguely dreading that this won't work, that the prosthetic's not under his control, that it really is just a weapon—but after a bit of concentration, the arm thrums to life, pouring out heat into the water. It shouldn't feel like such a rush, just being able to use his arm for something as simple as a hot bath, but it makes him feel lighter.]
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