After his first time playing in the barracks, Rex began playing anytime he had spare time. During the day he would play upbeat and energetic songs in the mess while he was on his lunch break or when he needed a little time away from his paperwork.

During the beginning of the sleep rotations he would play lullabies softly in the barracks, soothing away nightmares with the reminder that they were not alone, trying to hives his troops as much peace as he could.

He would even play in the gym or for those doing menial tasks if they asked.

Everyone on the Resolute knew about Rex and his violin, except the Jedi. It wasn't out of any attempt to keep it a secret or anything, the Jedi were just never in the right place at the right time to hear him play and the troops never really talked about it when they were around. And so it became, rather unintentionally, the Resolute troopers secret.

Until it wasn't anymore.

...

Ahsoka and Anakin were heading to the gym to spar.

"This time I'm going to win," Ahsoka boasted.

"Sure you are, Snips."

"Just wait and see Skyguy, I've been practicing."

"We'll find out soon enough," Anakin grinned as he opened the gym door.

They both froze in shock, jaws dropping at the sight in front of them. Inside the gym all the equipment had been moved to the side and all around the room were dozens of troopers dancing and playing around looking like they were having the time of their lives. In the middle of the room there was a dance off going on, troopers pulling crazies and crazier moves that were bound to eventually send them to the medics.

And in the center of it all was Captain Rex playing a violin with the biggest smile either of them had ever seen on his face as he watched his brothers.

Leaning closer to Ahsoka, Anakin asked, "Did you know Rex could play the violin?"

"No," she said distractedly, wide eyes never once leaving the sight in front of her.

"Did you know he had a violin?"

"Nope."

"Just checking," Anakin said before leaning back away.

"Hey Skyguy, do you think they'll let us join?"

"There's only one way to find out."