Luke's always been the protective type, especially over his team. He never let them go in first, standing infront of them at all interactions with an unsub. It was just in his nature.

Especially with you. You aren't a field agent of the BAU, but goes with them because you have a way with their words and can usually talk psychopaths down. Unfortunately, today was not that day.

He watched as Hotch let you go in first, hands up to show you weren't armed. But just a few words in, and the psycho had a bullet in your shoulder.

Luke didn't waste a second pulling his trigger, letting JJ handle the hostages while he ran over to you.

"Hey, hey, you'll be okay. Just keep your eyes on me. 'Kay?" He brushed your hair to the side. "Hey, hey, no. Eyes on me, not on the wound." He tilted your chin to the side when you looked away.