Titus remained serious, bracing himself slightly when the girl got up and took a defensive posture. Having been in the wild for so many years, he was very attuned to the body language of other beings, even humans, though he had spent little time among them. He could tell this girl was wary, her eyes watching him carefully as she spoke. However, when she looked around at the various animals, he opened his senses and realized that there was indeed a large number of beings nearby, including another human, who seemed to be ignoring them. When the girl turned back to him, questioning him once more, her defensive posture seemed to have relaxed a little as she gave a small smile. He allowed himself a returning smile and crossed his arms in front of his chest. 

"Why would I say something as silly as that. You know there's no such thing as ghosts." He glanced around at the depressing state of the zoo, his smile fading as he spoke again, half to himself. "Although, memories of sad events and loneliness can certainly leave behind feelings that could be mistaken for spirits of some sort." His attention turned back to the girl in front of him, his eyes locking with hers. "I came here in search of some people who might be able to help me. You see, I have a certain... health condition and I'd heard that there were some people near this city that might be able to help me."