Chantu was a draenei whom Jaruk Bloodfyre and Leena visited at their one year anniversary. He wanted them to stay with him, but Jaruk refused, telling him that they must be on a move from his brother - J'argg Bloodfyre. As Jaruk left his cave, J'argg, his orcs and captured Leena appeared. He seems to survive as a figure of a draenei is seen in the last scene.
It's likely that after Jaruk's death, he took care of Leena.