(This chat takes place in season 3 or 4) Shiro and the rest of the paladins of Voltron were defending a planet from the will of the Galra Empire. After the battle with the main fleet of Galra they started to help clean up the debris, but there was one sentry that they missed. And that sentry was about to shoot a child when someone nearby ran over and stood in front of the child getting shot instead. Shiro saw the scene and ran over and quickly destroyed the sentry, and then checked up on them.