Vivian was a little wary of Claude's invitation.
She had more than 10,000 years of experience on Earth and had seen all kinds of storms on various planets. She was not a coward. She just found this Claude very weird and suspicious.
For a young demon hunter, even if he were gifted in magic and combat skills, he would lack the necessary experience and wisdom of life. Such a young man must lack both. But this Claude clearly doesn't fit all of these characteristics and he also admitted that there was 'something else' in his soul. In this case, Vivian must be cautious. "Before I go with you, who are you? Claude? Or something else? If you're some old guy you can tell me honestly. I don't think there's anything older than me on this planet. Maybe we are old acquaintances."