Aria Of Sorrow
Julius is around 56 years old with amnesia and don't remember much of himself and is trapped in Dracula`s castle wich is in an eclipse (Possibly gotting stuck there after Dracula`s Final Demise).However after Soma progressed through the game,Julius got back his memories.
Discovering Soma being Dracula`s reincarnation
Julius decides to fight Soma despite it hurts him for being a friend with him since they met.However despite the fact that Julius Belmont in the boss battle is hard and challenging,Julius took easy on Soma Cruz and held back.Julius keeps the promise to Soma Cruz that if Soma Would fail,Julius would have permission to kill him
Dawn Of Sorrow
Castlevania/Castlevania II/Castlevania IV
Akumajō Special: Boku Dracula-kun/Kid Dracula
Castlevania: Order of Shadows