It's his job to know what's going on, Jyn thinks out of the blue, without knowing why. She doesn't dispute that, because it's probably true, nor does she zone in on Poe's uncertain statement immediately following his defense of Cassian.

She bristles, however, at the idea that Cassian needs to be defended from her.

"I didn't order BB-8 to do anything," comes her careful retort, quietly defiant, setting her glass down and wiping the condensation off on her pants. "I said Cassian doesn't get to decide what I do or do not know. That's not an order, that's a choice. Thanks for the water."

A+ social skills with Jyn. Why make friends when you can make antagonistic acquaintances?