Sugurono Takashi
Assistant P serves as the supplies manager in Ryugu Shelter. His main task is making sure that every inhabitant's basic needs are being fulfilled. Since he's also very popular with the children, Pete regards him as his rival.
Behind Assistant P's kind penguin mask, Sugurono Takashi is actually pulling the wires. He uses the personality of "Assistant P" to get around Ryugu Shelter and keep everything in check.
Takashi also used Assistant P to hide his true face and entertained the Ryugu Shelter inhabitants fated to die on their last trip to "Ise Shelter" - in reality, a large mincer where people got knocked out, undressed, thrown into a large chute, and chopped into pieces to end up as animal food and fertilizer.