After his parents' death, Julius was orphaned and avoided by his relatives like an Aragami until Dr. Rachel adopted him as his surrogate mother and raised him as the first Blood member. During his time in the Magnolia Compass orphanage, Julius and Ciel Alençon met as children, but they never bonded as friends. Years passed and Julius remained the sole Blood member until Romeo Leoni's recruitment. A year after Romeo, Nana Kouzuki and the Protagonist entered Blood followed by Gilbert McLane and Ciel Alençon.