After dealing with Alexa, Shera had one more thing to do; she was yet to speak to Carlos. Even though she had already managed to recruit the doctor she thought would best fit the slot, there was no harm in having one more. After all, injuries happened every other day, and one would never know when many doctors would be needed at the same time.
Hence, she had Fourteen and Ash 'invite' Carlos over for a cup of coffee and a chat.
When the man was brought in, he was still in his lab coat, with rage written all over his face. If he did not recognize Ash as Shera's assistant, or if Shera wasn't Leo's woman, he would have either fought back or chosen to perish together if that was what it took to stop them from rudely abducting him.