Halka Four-Den was a Galactic Republic commander of Alpha Team during the Republic Era, and was female. As an expert, Halka Four-Den once led her Alpha Team to chart and map the expanding territories of the Republic. They were dispatched to the planet Dagobah with the mission to document and analyze the planet's unusual flora and fauna. Halka Four-Den meticulously documented the distinctive plant and animal life they found on Dagobah, including her team's observation that the knobby white spider would eventually mature into gnarltrees.
The team, led by Halka Four-Den, did not find the Cave of Evil. The team was eventually overcome after just three months by the lethal diseases, hazardous creatures, and rapidly proliferating plants of Dagobah. No evidence of Commander Halka Four-Den or her Alpha Team has ever been found.