Many people would think Mylene is annoyed by Shadow, but think of how many times they've been seen together. Here are some examples.1: NV, ep 3: Get Psyched. Mylene agreed to follow Shadow to where the resistance was2: NV, ep 20: Beta City Blues: Mylene and Shadow team up against Baron and Dan in Beta City3: NV, ep 22-23: Underground Take Down + Wall to Wall Brawl: Mylene and Shadow team up against Shun and Marucho in Gamma City.4: NV ep 37: Virtual Insanity: When Billy returns, he is followed by Mylene and Shadow, and leads them to Marucho's Mansion.In future episodes of Bakugan, something may happen between those two.