Shadow didn’t really want to let the boy go, considering that she wanted to shield him from the dangers, but she also knew his boundaries. As a result, she let go of him, just in time to see his red, embarrassed face. It made her chuckle but in a good-hearted way. Turning her attention to the window, where Yugi was looking, the genie swore she heard about her master’s determination in knowing that his best friend will pull through. Internally, she knew he will...his victory proved that. 

Appearing next to Yugi, back in her duel monster form, she gave Yubel a smile, and a wink, silently telling her that more victories are to come, and that their goal will be met...in helping their owners beat Pegasus.