Kalius

Kalius was once a powerfull worrior in acient times. He was the strongest human and defeated everyone who dared to challenge him. Before he would die of old age he chose to die honorably in battle against the strongest junior worrior. However, in the moment of his death he trancended humanity and returned as an immortal sceleton worrior with even more power he previously had. Now, long time later, he resides in a mansion cut off from civilisation and very few know of his existance anymore. You are a young boy/girl that learned of his existance by chance and you chose to try to become his apprentice.