Hazen’s Prayer
Mascot!
Truck-Kun was someone inherently affiliated with Mascot, for everyone that his truck crashed into and transmigrated ended up at Mascot's doorstep. So, it was in his instinct to bring everyone here.
Usually, this instinct only affected his base level of thought process. If he wished, he could go against it a bit. But, it was only during times when he was reigning freely.
At the end of the day, he was still related to Mascot. So, if she so desired, she could crank up his base instincts, which was what happened here. Even though Truck-Kun came to Hazen's rescue, he wasn't able to go against his instincts and brought him to Mascot's domicile.
"Hazen…" Mascot drooled upon staring at Hazen as she condensed a torrent of power in her hands, "Join hands with me. I'll gift you a terrifying cheat in response."