|Born||? Years Before Rapture|
|Died||Midpoint of Tribulation|
|Spiritual State||Saved during the Tribulation|
|First Appearance||The Indwelling|
Demetrius and Laslos helped Rayford Steele elude the GC in a stopover in Greece after Rayford attempted to assassinate Nicolae Carpathia. While giving Rayford shelter for the night, Demetrius counsels Rayford on his guilt about the assassination attempt and the anger Rayford had been feeling for quite a while. They even put him with a non-English speaking beliver, a man named Adon, to change Rayford's appearance so he could further elude the GC on his way back to the United North American States.
During The Mark, Demetrius' underground church was raided by Global Community forces and brought to a holding facility for criminals and dissidents. Demetrius, along with his wife, Mrs. Miklos, and dozens of others were arrested and faced either taking "mark of loyalty" or suffer beheading. While imprisoned, Demetrius led dozens of adult male prisoners to a saving knowledge of Jesus Christ as their Lord and Savior.
The GC guards were angry with his preaching and pleading of the male prisoners and, in an ensuing riot between guards and prisoners, Demetrius is hit with what should be a fatal blow. Like his wife and Mrs. Miklos, who also both suffer such blows, he is still alive. When the time came for him to either take the mark or lose his head, Demetrius, being held up by two men at the front of a long line of new Christians proudly chose to be martyred.