This Tailhead was a crewman aboard the Miradorn raider, commanded by the Miradorn twins Ah-Kel and Ro-Kel. He was part of the crew who blocked the entrance of the security office after Ro-Kel was murdered by the Rakhari Croden. (DS9: "Vortex")
According to the script of the episode there were four crewmembers with Ah-Kel during the block of the security office entrance, two gatherers and a pair of "weird-looking" aliens. In the episode there was only a brief view on three of the members, two of them blurry in the background.
The DS9 Season 1 DVD special feature "Michael Westmore's Aliens: Season One" featured a photography of all four crewmembers, including the clear shot of the tailhead and also the second, unnamed alien.
It is unknown if Ah-Kel and his crew survived the explosion in the Chamra Vortex.