Hailing from Greece, Eudoros excelled at the Peripatetic school of philosophy, becoming an accomplished philosopher. He later moved to Alexandria, where he became one of the most respected intellectuals in the city, eventually becoming a scribe in Ptolemy XIII's royal court. Eudoros also suffered from a discomforting skin condition, resulting in him frequenting the bathhouse to ease his condition. 
At some point in 48 BCE, Eudoros wrote a work on the Nile like his fellow philosopher Aristo of Alexandria. Eudoros plagiarised his work on the Nile and after months of argument used his position as the Royal Scribe to accuse and charge Aristo with plagiarism, causing him to be arrested by the phylakitai.
That same year, Eudoros wrote a letter to Medunamun, a fellow member known as The Ibis, informing him to remain vigilant due to recent deaths of the other members, namely Rudjek, Actaeon, and Ktesos. Eudoros kept these letters in his office at the Ptolemaic Royal Palace, and they were eventually found by the Medjay Bayek of Siwa, who later infiltrated the bathhouse that Eudoros was in and killed him with the Hidden Blade. The incident cost Bayek his ring finger during a brief struggle between the two. As Eudoros laid dying, Bayek accused him of being the Snake, who was responsible for his son Khemu's death, but Eudoros taunted that the Snake could never die.
- In the Official Guide, Eudoros is listed as being born in Greece. Historically, however, he was born in Alexandria.
- When infiltrating the bathhouse, a man can be heard saying that Eudoros likes to stare at naked boys, suggesting that Eudoros is possibly homosexual or bisexual.
- Eudoros himself mentions how he "should never have consorted with that sailor", believing his skin condition to have been a venereal disease.
- The name Eudoros is derived from the words εὖ (eû) meaning 'well' and δῶρον (dôron), meaning 'gift'. In Modern Greek, Εὔδωρος (Eudóros) means 'well-gifted'.
- After assassinating Eudoros, an opium pipe and hippopotamus meat are looted from his body.