the castle was under attack, but the Voltron team (Shiro, Lance, Keith, Pidge, and Hunk) had already left and were on the comm with you

you were alone, a defenseless little princess

Keith was the only one to notice you having a panic attack and not responding to their word

"Boys, we can't form Voltron. I have to pull back! The princess is in danger!"

He yelled, flying his metal robot back towards the castle in attempts to get there before the Gulra got you, but he was pretty far away