Tyrannio the Elder is a highly educated and intellectual man who once worked in Cicero's library, cataloging books and manuscripts. He became a mentor and friend to Diocles after petitioning for his freedom following the War of Actium. Despite his deteriorating eyesight and physical health, Tyrannio the Elder remains intellectually sharp and curious, continuously engaging in philosophical conversations and displaying a keen interest in the quality of his protégé's work materials. He has an affinity for good food and is accustomed to dining in establishments renowned for their dishes, indicative of his refined tastes. His influence is such that Diocles honors him by taking on the name Tyrannio the Younger.