Hannibal felt it was a very good thing to be more than just a toy to Baba Yaga. Were he seen as such, he would be very disposable to her. He was not quite ready to be disposed of yet.
Despite learning that the two didn't have any direct contact with himself, River or even Baba, he was not willing to let them just waltz away. He had come here with purpose. He had found the ones he wanted. They would be his.
His previous idea that Baba was unhappy with her treatment at Arkham was confirmed with her action on his arm. She had clearly been more than causally mistreated. She had not dealt with just neglect or slight misuse of medications. Anger such as hers, anger the likes of which he sensed on her and could even smell despite her calm exterior, came from more.
"You know more about the City than any that I have previously encountered." Hannibal turned and looked at her. The body she was in now was small, but it didn't matter what size the power came in, did it? "I would be interested to know more at some point."
Falling into the act of two lovers spending time in the park, Hannibal turned her, letting his hand slide to hers so that they were clasped. He placed his hand on her face and looked into her eyes. From his peripherals, he could still see the couple, still keep tabs on them, but it wouldn't be obvious to anybody but Baba that he was discussing them, or watching them.
"I have no complete plan as of yet. I came out to hunt and I have found. What happens next will be spontaneous." Her eyes, if one only looked at the surface of them, were not the eyes of a killer. They would be capable of charming any person who saw them and convincing them of her complete innocence. "In my pocket, though, I do have some syringes filled with medications that will make them complaint. Easily coaxed."
He was quite sure that River would approve of absolutely none of what was going on currently. Funny that he should be doing this on her behalf.