It's because the 0's AD count as a century. 0-99. The second century is 100-199. Third is 200-299, et cetera.
Anyway
Yes, his Mortal Form is in fact a woman.
Name: Aurus
Age: 257
Alignment: Good
Class: Supreme Force of Good
Appearance:
Angelic Form; Shown to allies and used as an Avatar of Divine Retribution
Mythos Form; A form reminiscent of the old Avatar of Divine Retribution, assigned to Aurus by those outside of the main beliefs
Mortal Form; The form Aurus takes to walk the earth and lead his unwitting apostles to secluded places so he may reveal his true form, also his form taken as the Ferryman of the River Styx
Powers/Abilities: Telepathy, Godforging, Light Enchantment, Form Change, Flight (Angelic Form), Functional Immortality, Death's Kiss (Mortal Form), Master of Blades, Unrelenting Stamina, Resistance to Darkness and Shadow
Personality: Encouraging, Tenacious, Treats his comrades like brethren and equals, Forgiving of failure, Empathetic, Understanding
Biography: Aurus was created as a divine entity for the sheer purpose of dolling retribution. Originally, he served under his predecessor, whose form is still considered his, as the Avatar of Divine Retribution. For 100 days and 100 nights, Aurus trained with the longsword and the shield, never resting, nor eating, nor drinking. After he was finished, he matched his predecessor's skill with the longsword and shield. After a week of rest, he spent another 100 days and nights training with the claymore, again, never resting, eating, or drinking. Another week of rest, and he began with the spear. Then the dagger. Then the sickle. Then the scythe. He was learning the ways of the bow when his master was killed by an entity of darkness. He was on his 34th night. He then sought to hunt down this entity and strike him down. He succeeded and was given the title of his predecessor; Avatar of Divine Retribution. He was also given the domain of Ferryman of the River Styx by his creator, so he visits men in the night and gives them a kiss, allowing them to pass on. Time passed and he was recently given another charge as the Avatar - to cast Xanethus from the Throne of Shadows and end his wrought.