A member of the Bajoran resistance working aboard Terok Nor in 2346, who recruits the time-travelling Kira Nerys into a plot to kill Gul Dukat with a bomb.
Halb Daier appears in Wrongs Darker Than Death or Night, played by Tim deZarn.
When Kira uses the Orb of Time to see the truth about her mother, she is expelled from the comfort women's quarters and ends up among the Bajoran labourers on the station. There she meets Halb, who belongs to a resistance cell operating under the Cardassians' noses and quickly judges that the newcomer can be trusted.
Halb's group wants Dukat dead and needs someone who can reach his quarters. Kira, angry at her mother's apparent contentment as Dukat's mistress, agrees to carry the bomb, and Halb supplies it. She plants the device but then drags both Dukat and Meru clear before it explodes, unable to let her mother die.