Shiro bolted up and started for the door.

He walked out into the halls of the castle ship in his sleeping clothes and slippers, not caring about his clothing condition, only partly because he assumed everyone was asleep. Until...

"Shiro?" Allura said abashedly.
The pajama'd person turned around. Allura looked a little stunned. "What are you doing strutting the hallways at 1 5 RE?"
Shiro briefly tried to remember what RE meant in human time but quickly gave up. "I was gonna... hit..." Shiro made something up. "...the gym."

"At this hour?" Allura retorted. "No. You need to be well rested in case of another galra strike. And going to the gym is just going to make you more exhausted in the morning."

Shiro looked a little bemused, a little absent mindlessly at the metallic walls of the castle ship. "You're thinking about things, aren't you?" Allura asked.
Shiro stood still for a moment and looked far away at the floor. "Yeah."

"Here, take this."

.<--