[What he notices most honestly, is just how pale she looks. Clearly she's been through something, and Keith, if he's taking what little bits of observation he can, thinks that whatever happened to her memories was done to her deliberately. But that's not something you say to a stranger.

Instead he goes with,]

You okay?

[But oh. The question.] Fighting to stop the Galra Empire, free the places under their control, stop them from enslaving anymore. ...more specifically, last I remember, I wad mid-battle.