The Fifth Pet

Looking at the trust that Geo had shown, Ace's ego as a father was challenged. While patting his son's hair, he thought hard. He then looked at the parasite that became more honest after it had gotten Mars's assurance. Then a thought appeared in his mind. 

He then said, "Hey, parasite. As you tried to provoke us to kill the snake. It means you can live outside of the snake, right?"

Ace thought it would act stubborn again. But, to his surprise, he answered, "Yes. But I need a new monster to be my host. And it is impossible for me to get out of its body, it is just impossible. Except if you want to kill it."

Ace then nodded. He then looked at Mars.

"Boss, do you have something to confine a small monster?" Ace asked.

Mars showed his interest, but he then shook his head. He said, "Unfortunately, no."

As Ace wanted to think of another means, he heard Mars, saying, "But maybe I can make it."

"Huh?" Ace was confused.