The blonde girl Nate lifts the bracelet off of in the beginning is Elena
She's the only one of the main cast we never actually see throughout the movie. Her flirting with Nate is a hint at her identity. Also... Related to the above, the person confronting Nate and Sully at the end is the girl/Elena.
Given that the ending seems to be setting up an adaptation of the first game. With the scene mentioning Roman, it would make sense as the scene is almost identical to a scene from the first game where she confronts the two after being abandoned by Nate. Would also explain why Nate is exasperated but Sully isn't. The potential sequels will make Nolan North's appearances a Running Gag.
Once an Episode, Nate will run into him after getting out of a situation similar to one in the games, followed by North's character stating that something similar happening to him. Alternatively Nolan North will be revealed as the Drake's father.
The actor already expressed interest in playing the role.