The Final Virtua Soul: Get all Virtua Souls then talk to Dot(located in 2nd Server Lobby) and he will open up the mission server "Legendary Battle" . Finish the mission and recieve the final Virtua Soul "Hougeki Unshin Soukoshou".
The Soul Energy: Get all Hunter Badges , complete Master Test from Goya and finally defeat Goya in his final test.