Rengoku Kage

Description
Rengoku Kage is the first son of Osoroshi Kage and Rene Harehi. He was born a few minutes later than Akuma Kage. He is a Purgatory Dragon Slayer just like his mother. Before he joined Fairy Tail, he was in the Scarlets guild with his father and other siblings before they also left. He was usually mind controlled by his father and was forced to fight.

Dragon Force
When Rengoku activates his dragon force, his appearance changes and he becomes stronger. He becomes half dragon, half human.