One of the current problems in creating a roller coaster fit for this world was finding something thrilling enough that would scare even demi-humans.
He tasked Lolo, the Mayor who knew every single Rebornian citizen and tourist by name, to survey all the different species of demi-humans to find their weaknesses. As expected of the talented Yellow HobMankey, he was able to procure a comprehensive list on everyone's 'kryptonite'.
For example, Dogfolk hated lightning, Lamias hated flying, while Satyrs were afraid of death in general.
But of course, he just couldn't simply implement those features in a roller coaster and call it a day. He needed to find out the right amount of dosage to make it thrilling, but safe. He didn't want anyone to get really hurt from this roller coaster, just scared to their wits end.
One of his ideas was to get a paid, voluntary test group that would test the limits of these features. However, that would take a lot of time—something he currently did not.
