He stares hard at the fire. He wouldn't have told that story if he'd known the memory would play out. "It means I'm only half human. The rest of the Blades you saw are Galra and I am too." Keith raises his head, thinking over what to say and adds,

"The Galra have been terrorizing the universe for over ten thousand years. The Blades are rebels against their own kind." He'd learned the Galra were the enemy and only just got to accept that some were on their side. "It was a bit of a shock at the time."