As Sylvan and Patrick worked for the World Government, whenever any echelon from the government wished to enquire anything about Delta City, they would do it from them. So when House of Hestia sent a command to help them find Zed, they naturally jumped in action to fulfill it.
While neither Sylvan nor Patrick knew why the great representatives of the aristocrat family wanted to find Zed, they believed it must be for something important, especially when they saw Lady Rebecca stepping out of the jet.
Still, when Zed became disrespectful, Sylvan couldn't control his anger. In this world, no one had the right to be cold or disrespectful in front of an aristocrat!
No one!
And since he wanted to show his loyalty to the great families, Sylvan shouted at Zed to be respectful!
He expected Zed to cower and apologize but what Zed did made him feel faint.