Alcia was the First Prelate of the Drayans, the isolationist leader who explained her people's reverse aging to Janeway.
Alcia led the Drayans, a secretive and isolationist people who rarely allowed contact with outsiders. She guarded a sacred moon where Drayans at the end of their lives went to die, and regarded Voyager's presence there as a desecration.
In Innocence, Alcia contacted Voyager to demand the removal of Tuvok's crashed shuttle. Janeway feared she meant to harm the children Tuvok was protecting, but Alcia revealed that they were in fact elderly Drayans whose lives were ending, since her species ages backward. She allowed Tuvok to stay with the last of them, Tressa, until her death.