After sharing a good laugh, Nathan asked Vincent if he could stay with him, but Vincent politely declined. He had made a promise to Evangeline to find one of the missing pieces of his medallion. He was hesitant about following her at first, but he changed his mind after realizing that it could make him stronger.
In return, she had promised to keep a close eye on Nathan's Family safety and assign multiple vampires to guard them in the shadow. Though the Organization behind Wayne Corporation downfall was powerful, Evangeline was not afraid to confront them directly. Her only fear was that they might discover Vincent's true identity, which would make him a target for other more powerful organizations.
Nathan watched as Vincent car disappeared into the road, his heart heavy with both excitement and worry. He knew his best friend wouldn't leave without a good reason, but he couldn't help but feel a sense of loss as he walked away.