Byleth took the offered space, though he had to adjust his sword hanging at his hip to make it comfortable (no clipping through solid objects game physics here). He sat very straight-backed, his hands on his thighs - a rigid posture that, oddly, seemed to be perfectly comfortable for Byleth (it meant he could spring to his feet at a moment's notice).

"This place does seem to drain one of their energy." Byleth had felt initially groggy as well, but had ignored the funk with well-worn experience. "I'd offer to alleviate your symptoms, but... my magic only works on physical injuries, rather than ailments or malaise. Apologies."