Flavius Metellus (c. 90s BCE – 47 BCE), also known as The Lion, was the Roman proconsul of the province of Kyrenaika. He was also a leader of the Order of the Ancients during the reign of Cleopatra and a close ally of Julius Caesar.
Flavius was born in the Roman Republic to an old patrician family which had lost much of its wealth. He was later married to an unknown woman who he had a son with. Flavius later married another woman named Porcia Orestilla, which helped to restore his family's treasuries.
Flavius later rose through the ranks of the Roman army and became a close ally to Julius Caesar. Due to his distinguished military career, he was later selected to become the proconsul of Cyrenaica, a position he held until his death.
Quest for the vault
- "The Snake takes that as your answer."
- ―Flavius, moments before killing Khemu
They had their soldiers capture Chenzira, a friend of Bayek's son Khemu, and convinced the boy and his mother Rebecca that they only wished to speak with the Medjay. Chenzira led the soldiers to Halma Point, where Bayek was defeated in combat and knocked unconscious, after which he was brought inside the Temple of Amun and before the Vault door. Flavius's fellow member Medunamun showed Bayek the Apple, but the Medjay did not know how to unlock the vault door. Frustrated, Flavius kicked Bayek to the ground, but was calmed down by Pothinus. 
Before the interrogation could continue, the Pharaoh Ptolemy XII, who accompanied the Order to Siwa, came to investigate. Flavius and some of the other members went to distract the Pharoah. Khemu managed to steal a knife for Bayek, allowing the Medjay to cut free his bindings. Returning, Flavius then brandished a sword at Khemu, threatening to cut the boy's heart out if Bayek would not tell them how to open the vault. Bayek then broke free of his restraints, and a scuffle broke out between him and the Order. 
Bayek pinned Flavius, holding the knife to Flavius's throat. The Roman simply sneered, taking Bayek's assault as his answer, and deflected the blade away. The blade instead struck Khemu in the chest, killing the boy instantly. A grief-stricken Bayek attempted to attack Flavius, but the latter used the Apple to knock the Medjay out. Flavius and the rest of the Order then fled the scene. 
Equipment and Skills
Upon possessing the Oracle's Relic, he displayed a number of miraculous abilities. He has shown the power to create tangible-holograms of his former brothers which attack Bayek. He could also turn invisible, project golden energy and fire a kinetic blast which slows down Bayek momentarily. He is also a skilled swordsman and hand-to-hand combatant.
He is a strong political leader and mastermind, having become the leader of the Order of the Ancients due to his cruel doings. He was also able to use his influence upon Caesar to spare Septimius, despite the fact that Septimius attacked Roman Forces.