- "Now we are committed to the path."
- – Coplann, posing as Hedronn
In 2245, Coplann argued against Lenonn's requests for more support for the Anla'Shok. He doubted that the prophecies of Valen were coming true, and wanted proof before committing resources to the Anla'Shok. Coplann had said that the warrior caste would not participate in a proposed expedition. His rationale for this was that lives would be lost needlessly due to automated defenses guarding the Shadow's planet. Further, Coplann had said that if the council publicly endorsed such an expedition it would cause panic among the general population. Dukhat then decided that the council would undertake the expedition themselves. Dukhat then "thanked" Coplann for giving him the idea. Coplann then bowed his head respectfully. 
Coplann was present during the Battle of the Line.
He was among those who chose Delenn to be the leader of the Council in 2258, but she declined the honor, the first ever to do so. Delenn believed she had a part to play in Valen's prophecies, but Coplann and others were not entirely sure.
Posing as HedronnEdit
At the beginning of 2259, Coplann traveled to Babylon 5 in the guise of being a low-level worker in the Ministry of Culture named Hedronn. His mission was to confirm that Delenn had begun the transformation as prophesied, and also to investigate the rumors that the Tragati, a rogue Minbari warcruiser, had been sighted recently. After confirming Delenn was indeed undergoing a metamorphosis, Coplann authorizes her aide, Lennier, to divulge the reason why the Minbari surrendered at the Battle of the Line, should the Tragati ever appear again.
Just after leaving Delenn's quarters, Coplann literally runs into Kalain, now the commanding officer of the Tragati, who accuses the Grey Council of betraying the Minbari people. Coplann immediately goes to the new station commander, Captain John Sheridan, who has already been alerted the Tragati is in the area. When Sheridan suggests Coplann knows more than he is telling, Coplann rebukes him by saying that the Federation does not recognize his position, as he is the hated "Starkiller" from the war. Coplann then leaves, warning that if violence comes it is likely because of Sheridan's mere presence.
Coplann would later be the one to inform Delenn she had been stripped of her place on the Council, though he did agree to convene it so she could have one last audience.
- The actor portraying Coplann also played Hedronn, who were both present at the events of In The Beginning. Because of this, they are likely the same person. The use of a different name may have been a cover identity given to Coplann for this or other assignments where he had to travel, as Council Members' names are supposed to be a secret. Indeed, each member may have a cover identity, although this is unclear.