Mr. Grosser directs the boarding school on Planet M7.8, educating children of Ultra beings and monsters. He discovered infant Maa after a rescue pod crash-landed on the planet and chose to raise the child as his own, providing care and stability within the school. His leadership extends beyond academics to overseeing students' daily lives and fostering their development. Demonstrating a rehabilitative approach, he integrated individuals like former food thief Dodgey into the school staff following behavioral resolution, reflecting a commitment to mentorship and community support in the educational environment.