When Thanatos walked in, he could see and understand that Lucie was angry about something or another, but that didn't mean that he was particularly worried about it, as much as a creature such as he could be worried about anything, really.
"Time has little meaning when the world is trying to end," Thanatos pointed out to her. He felt a little out of sorts himself as of late. Something was going on in the human world above. Something that none of them had predicted. "What is it that you needed to see me for?"