Darzen Odan was a joined Trill, and a member of the Trill ruling council in the 21st century.

As the eighth (at least) joining for Odan, he tended to be politically conservative, stressing the need for long-term stability in Trill society. This attitude was relaxed somewhat following the crisis that arose when an unknown alien vessel (later learned to be the L'Dira) attacked the planet, killing over fifty. He volunteered to serve as Lela Dax's advocate when she faced treason charges for attempting to communicate with the L'Dira.

Darzen Odan was married, and had at least one daughter. He was a passionate gardener, and cultivated flowers on his property in Leran Manev. (DS9 short story: "First Steps")

Darzen Odan is undoubtedly intended to be one of the previous hosts of Ambassador Odan from TNG episode "The Host".