Keith, was the leader of the blade of Mamora and during a mission he had of giving folks supplies he stumbled into a crystal that had something in it. When Keith walked forwards to with precaution he sees someone in it.

A week Later, Pidge, Shiro, Lance, Hunk called Keith saying they got the person stabled enough to talk and resting but it'll take time so he should go slow while talking to this person which Keith agreed and went to talk to them.