Alex just shrugged off the surprised expression. Some of the monkeys were still alive just badly wounded ad unable to stand up. He would have to perfect the attack. What if Elsa or Amber got attacked and killed just by a surprise attack... When she spoke he listened. Elsa probably couldn't get on his bad side if she tried. Alex had a tendency to stick to first impressions and even though she pokes a hole in his coat and threatened him she had still seemed kind to him, due to a single deed done for him. And the fact she was the first person he had seen in quite a while. He had some kind of bias to try and see the best in her for reasons he couldn't explain. 
"...Telepathy? Perhaps. If so we should be more sneaky now. Any person with an ability to control minds can't just be taken head on. Alex says while kicking one of the squirming monkeys twice quickly and it stopped breathing. Alex felt no regret or guilt killing these monsters. They did not have the innocence of earth's animals. He then realized how much he was starving. Only able to use his ability so much at once he had forgotten to fill his stomach. "... Lets continue shall we?" He says weakly.