He could have been a death trooper. Jyn isn't sure she could look the other way if that were the case, but Poe said he couldn't kill civilians so Jyn can't believe this Finn person would be accomplished enough to be one of the elite death troopers. Not unless he was fully prepared to kill a young mother in front of her husband.

She jerks forward when the kettle blows, automatically shifting it to a cold burner and snapping the knob to off. Even though Cassian is right there, close enough for her elbow to brush against as she sets tea bags into tea cups. She doesn't protest the tea meant to put her to sleep, but she does look up and make a face at him, before turning her attention back to Poe.

"How old were you when you joined?" It's a weird concept to her still, joining the Rebellion. She was raised into it, Saw had it land on his home planet. Purposefully choosing that life is... hard to imagine.