Eric was not the suffocating force of emotion that he knew Peter could be, and the understanding that Leeloo was capable of handling herself without his assistance allowed her the freedom she deserved. He knew from their adventures in the Wilds that she could fend for herself, and though this was not the same woman Eric had known in that time, she was still the same capable entity. She just needed the chance to really get out and explore without burden.
Bran was willing to keep an eye on her, and flew at her side to do so, but the bird wouldn't be in her way when she did what she sought. When she fought, Bran as a mere shadow perched atop a light post or a balcony, far above the realm of detection to anyone that wouldn't have already known he was there.
The call she emitted when she was ready would not reach him in the way it would have the hybrid. And yet she didn't have to call. Not really. Bran was transmission enough to warrant communication between the them. The look on her face, determined and bright, was enough to draw the Avenger from the shadow of the rooftop. Easily he had scaled the overhang and pulled up on to the flat part of the roof. She stood above him on the chimney, Eric looked up at her with a smile. "Having fun?"