9.13.7 You foolish human.

Was Rosso a bit crazy, well truth be told, he was once Jester's fate was involved. 

Being his creation, all he has in his mind are imprinted memories—no personal experience, no heart-to-heart. 

It's like remembering the father through the stories you read in books and when you finally get the chance to meet him, he is going to be killed by someone your father considered a friend. 

It took over Rosso's rationality, took over his mind, and made him do stupid things. Such was the life of Jester's creation. 

This is why when the Cat dared to cause him problems, Rosso easily annihilated it, not thinking too much of it. But Farhad, the scene that appeared on the front made him go crazy.