Anna looked terrified. "You know ..If you try to harm me you will just make her more scared of you and she will not stop.." She was trying to bluff to try and get herself out by kicking at Starscream but gasped in pain when she made impact with the hard metal. 

Elsa was more terrified Starscream would hurt or kill Anna. She wanted to try and save her but that would cost her. "Let my sister go.." She said in a serious tone as she attempted to get some control. It worked and she sent some ice spikes at the weopon the Decepticon held. She would not allow her sister to be harmed. Yes she was aware of his threat but she thought if trying to disarm instead.

Hiro dropped the subject upon seeing Kaika in conflict. "incoming enemies!" She said rushing to slash at the Replicas to protect Kaika.