This enemy only appears when an Uhlan and a Corps Regular or PSICOM Tracker appear together. It is created by the human trooper, and will be re-deployed if destroyed. As long as the Targeting Beacon is on the battlefield, the Uhlan will make powerful Fire-based strikes on its location. Your best bet is to take out the trooper first, then the Beacon. Note that this enemy is very easy to miss if you're going for a 100% "check-mark" bestiary.