Rosalie didn't like Bella so she didn't do anything more than she was forced to by her parents. Esme was the one who switched clothes with Bella.
Rosalie had to scent mark the tree as she was wearing Bella's clothing. She did not 'blow' on the tree but rubbed up against it and then smelt the tree to see if had been marked with Bella's scent.
If you mean rosalie, she rubbed against a tree wearing Bella's cothes to throw James, the tracker off her scent so he would follow Rosalie, Edward and Esme and not Alice and Jasper, who were with Bella.
Jame's power is he can take the scent of anything and follow it. That's why Edward couldn't trick him into going the wrong direction as Bella.
James is the vampire tracker who chases Bella in the book Twilight. He is a skilled hunter and has a special ability to track his prey using their scent. He becomes obsessed with hunting and killing Bella, leading to a climactic confrontation at the end of the novel.
James the tracker
Aro in twilight ( The leader of the Volturi coven) is not a tracker but he can however ask Demetri to track anyone he wishes.
Victoria is the mate of the villain, the tracker James.
James.
James is described as cunning, manipulative, and relentless in the Twilight series. He is a skilled tracker with a thirst for violence and is willing to go to great lengths to achieve his goals.
If you are talking about the Nomadic Vampire ( James, Victoria, Laurent) it was James.Demetri is the Volturi's tracker.
If this is what you are asking, a tracker is a vampire who has a gift that helps them to find people, like Demetri of the Volturi guard.
he can find anyone, he's the ultimate tracker.