She followed Sara until she would stop, noticing that the Lieutenant seemed very distracted for a moment, possibly over the situation overall.  Patience eventually bore out, as she noticed that Katherine was following her, and then she asked.  This led to the Brunette raising her hand slightly and saying [color=f7941d]"Many."[/color], as this whole thing was very loaded.  And so, unaware that she may be inadvertently speaking OF the plan while asking about the plan, she unleashed her torrent.

[color=f7941d]"Eren, Armin, and Mikasa are all friends.  We came from the same district, the very one that had originally been attacked, five years ago.  It seems likely that I will also be a witness, to report on the facts.  I would like to be used to help Eren, not condemn him, if at all possible.  We should learn from him, make it a matter of all-important study, like I do, or my Aunt does.  Let me get Commander Zoe in on this.  She'll fight tooth-and-nail to study him, no question."[/color]

Kate was kind of a protege to Hange Zoe, and that much could possibly be guessed by her actions, although she was obviously better at machines and materials than biology.  Still, it wasn't a widely-spread fact that Hange was her [i]aunt[/i].  Generally, if people knew [i]anything[/i] about Katherine's family, it was about her mother, the engineer, Myra Bellows...  Still, Kate wanted to know the plan and aid the plan, not even aware that she may have just [i]figured out[/i] the plan without even realizing it.