At the start of the 2nd season, Delenn uses a special artifact to transform into a half-human, half-Minbari hybrid - initially treated with suspicion by humans and Minbari alike.

In season 3, Delenn and John Sheridan fall in love, which drives a further wedge between the Minbari religious and warrior castes, who soon break a thousand years of cooperation and begin a civil war against one another.

After Sheridan and Babylon 5 break away from Earth, it is Delenn who rescues the station with a fleet of Minbari ships, but at the cost of destroying the symbolic circle of the Grey Council.

Although her work saves countless lives and ends the great war, she returns home to a world fraught with chaos and death.

Her old rival Neroon saves her life, however, and in his death cries he joins the religious caste, which restores the balance of power.

The Babylon 5 pilot TV movie The Gathering was filmed with this in mind, but the computer alteration to Mira Furlan's voice to make it sound masculine was unconvincing, so the idea was dropped and Delenn changed to being a female.