Short answers, pulled from the story.
Arcadius was a Roman emperor who ruled from 383 until his death on the 1st of May 408. He governed the eastern half of the empire from 395 onward, following the death of his father Theodosius I.
Real power during Arcadius's reign shifted among a series of court figures: the praetorian prefect Rufinus, the eunuch chamberlain Eutropius, the general Gainas, and the empress Aelia Eudoxia. Historian J. B. Bury described Arcadius as inevitably governed by the stronger personalities around him.
Eutropius was dismissed on the 17th of August 399 and later executed after he persuaded Arcadius to grant him the consulship, provoking widespread outrage across the empire. The Ostrogoth revolt led by Tribigild also demanded his removal, and Empress Eudoxia used the crisis to push Arcadius into acting against him.
John Chrysostom, Archbishop of Constantinople, preached against displays of wealth and was believed by Empress Eudoxia to be targeting her personally. After he compared Eudoxia to Jezebel in September 403, Arcadius supported a synod that condemned the Archbishop, and by the 20th of June 404 had him exiled to Abkhazia in the Caucasus.
As many as 7,000 Goths were killed during the rioting in Constantinople in July 400. Those who sought shelter in a church were stoned and burned to death with the permission of the emperor Arcadius.
Arcadius was buried in the Church of the Holy Apostles in a porphyry sarcophagus, alongside Constantine the Great and several other emperors. A marble portrait head of him, wearing a pearl-edged diadem with a rectangular stone set above his forehead, was discovered in Istanbul in June 1949 and is now held in the Istanbul Archaeology Museum.