Rosa was already preparing to teleport them back to Earth. Seeing Luther get impatient, she was worried so she no longer waited for any cue to transfer their souls back to the human realm. She thought that perhaps her blood was the cause of this, he was looking dead awhile ago but due to the immense power he received from her, he was able to activate all his vampire forbidden skills.
He looked so terrified and traumatized, he must have seen something that he truly abhorred. Looking at him, he was paced out, staring at absolutely nothing, slightly open mouth, and breathing heavily. He was not his usual self.
"Don't look so bad like that when I'm here with you." She couldn't help but be terrified herself, she was worried for him acting this way. "I'm a goddess, remember? I am no longer that nosy little teenager that you saved at the dark alley. I can save them, I can save your friend Conrad."