Tracing Cream while she was in the hotel was easy; he didn't have to go anywhere to do it, just watch her progress on the cameras. It wasn't until now that he'd turned to leave. He'd use rooftops to follow and keep an eye on the small bunny and her suspicious package.
Batman trusted neither this situation nor the others involved. Luckily, he had plenty of practice following flying targets. He wouldn't lose track of her; she should be safe. If all went well, she'd never know he'd been there.