Fictional character. Commander of the space station Deep Space Nine.

• Portrayed by Avery Brooks

Fictional character. Son of Capt. Benjamin Sisko.

• Portrayed by Cirroc Lofton

Fictional character. Chief of operations on the space station Deep Space Nine; formerly a transporter chief on the starship Enterprise.

• Portrayed by Colm Meaney

Fictional character. Medical officer aboard the space station Deep Space Nine.

• Portrayed by Alexander Siddig

Fictional character. A Klingon who is a member of Starfleet.

• Portrayed by Michael Dorn

Fictional character. Ferengi bartender on the space station Deep Space Nine.

• Portrayed by Armin Shimerman

Fictional character. Shapeshifting constable on the space station Deep Space Nine.

• Portrayed by René Auberjonois

Fictional character. Leader of the space station Deep Space Nine during the Cardassian occupation. (''Gul'' is his title.)

• Portrayed by Marc Alaimo

Fictional character. Head Bajoran officer on the space station Deep Space Nine. Nerys is her personal name; Kira her family name.

• Portrayed by Nana Visitor

Fictional character. Trill symbiont who is science officer aboard the space station Deep Space Nine.

• Portrayed by Terry Farrell

Fictional character. Teacher and xenobotanist on the space station Deep Space Nine.

• Portrayed by Rosalind Chao