Hearing his comment about her, she aloud. Yes, she was a cold-hearted witch. Why? Because Tex had to be if she wanted to survive in her world. If she wasn't as cold as she was back from where she was, she would have been too close to people and they would have been the death of her- literally. Feelings were supposed to be suppressed and not expressed in front of spartans while out on the battefield. Feelings cause distraction and distractions would get people killed.
"Listen, Kid. Back on my world... it's kill or be killed. It is not all happy, happy with rainbows, sunshine, and flowers. No. We are constantly in war on my world and when I joined the army- I did it to try and put an end to all the damn madness. I kill because I have to."
She heard giggling coming from Anna and she glared at her through her helmet, an audible growl coming from her. "What the hell are you laughing at Freckles."
You should kill her. Omega had suggested in her head.
"No, Omega. I can't... kill her," Texas protested.