Lieutenant Karl Byorn Andressen commands the Marine detachment aboard the United Planets Space Force destroyer Soyokaze under Captain Justy Ueki Tylor. His Marines exhibit a rough, crude demeanor and constant eagerness for physical confrontations. They operate autonomously within their designated ship section, resisting oversight or cleanup demands from superiors like Lieutenant Makoto Yamamoto and Lieutenant Commander Yuriko Star.

In combat, the unit utilizes compact powered exoskeletons requiring pilots to crouch inside. Standard personnel wear yellow units, while Master Sergeant Cryborne, Andressen's second-in-command, operates a distinct pink variant. The Marines frequently clash with other crew members, particularly displaying hostility toward Lieutenant Junior Grade Kojiro Sakai, the ship's star pilot, at minimal provocation.