Thrax (Japanese: トラクス) is a Scythian slave. He is the slave of Theogeiton, who appears several times while mistreating him. From what Theogeiton says, one can conclude that Thrax has only shortly been made a slave and is therefore not yet obedient.
Thrax has fairly long, black hair and wears only a loincloth. He is usually seen shackled and sweating, with or without Theogeiton in his vicinity ordering him around.
Thrax has most likely only shortly been made a slave and is therefore not yet obedient. Theogeiton and his son keep him in chains. The first time Eumenes sees Thrax on the streets, he is being hit by Theogeiton.
The second time, Thrax walks over the street alone but is being mocked by a couple of strangers on the street. They kick the slave in the back and he falls. When Eumenes offers a hand to stand up, Thrax silently refuses this by just standing up and walking away.