At the tender age of 1, Tranna and her family moved to Silver moon City and made a living there, though one day the vile scourge attacked the city and killed Tranna's family.  Tranna escaped by way of the sewers.  In her flight from Silver moon  City, she made her way to the Kingdom of the trolls and orcs. When she arrived at the City of Ogrimmar, she had never seen orcs before and was lost on her way to the Valley of Trials. She was kidnapped by centuars. They took her to the hide out to use her as a slave; however three nights after her capture there was a commotion outside  her leanto. She heard wood hit steel and steel hit flesh. She peeked out the door.  Her heart jumped for there was a lone troll fighting four of her captors. He struck one of them down and took his spear and stuck another to a tree. The others dropped their weapons and ran. When the fight was over, the troll let out a roar of victory and screamed, "FEAR THE NAME THORVALDE STRONGAXE, YOU COWARDS". 

Then Thorvalde started to search the huts and found Tranna, who was hiding behind an over-turned table. Seeing the fear in her eyes, Thor told her, "do not fear little one, I shall not let anything hurt you again"!  From that day on, Thor and Tranna become family. If anyone picked on Tranna, they would regret it with the axe of Thor in their skull. They would forever be twisted in each others lives and could be the end of their's as well.