Herold ignored the fact Solares gave a thumbs up to Angsar and not him, despite having the same weapon. It was the Trooper's idea after all. Being an Arbites was nothing if not a thankless job, and it seemed he'd need to perform that job again just now. Armed Civilians were the most basic thing he needed to handle on a planet, and he had dealt with such problems many times before. 

The Arbites watched as Adrianne kicked the Cargo doors open, and knew she had to have used some of her Psyker abilities to help, which helped him see the use of using such energy. Still, her semi-heretical powers and obvious lunacy had him nearly wanting to aim at her back just as much as the crowd of rioters. He decided against it though, not wishing to harm an ally of the Imperial Inquisition. 

Briefly, he overviewed the tactical layout of where they were. The Trooper had gone up top, and the two women were down below with him. With the Grenade Launcher above, and both ground companions having formidable weapons, and one was clearly a competent Psyker, he doubted that there would be many civilian's left if Herold's companions open fired. So he decided to strap the Grenade Launcher to his back and retrieve his Shock Maul and Hydraphur Pattern Suppression Shield. He would take out any rioters that made it close, while simultaneously being near impervious to the wild, panicked shots that would soon follow when this crowd lost control of themselves. 

His face grim and hard set, the Arbites planted himself to the right of the Psyker, shield and Maul hefted. "Cease and desist citizens." He said, his gravelly voice as intimidating as his visage.