Lord Il Palazzo (Italian for "The Palace") as he is formally known by his underlings, is the leader of ACROSS, a secret ideological organisation dedicated to world conquest.Edit
Il Palazzo believes that the world has become corrupt, and seeks to conquer it to save the ignorant masses from themselves. In fact, he often prefaces his orders and speeches by proclaiming "the world is corrupt!".
A recurring gag during the anime is that, despite all his scheming, Il Palazzo really has nothing to do while Excel and Hyatt are out on missions: he is often seen pursuing surprisingly ordinary hobbies like learning to play the guitar and arranging domino blocks. These notwithstanding, Il Palazzo is no ordinary human being, as testify his yellow, cat-eyes and seemingly supernatural powers exhibited in 25. However, in both the anime and the manga, it is clear that Lord Il Palazzo suffers from severe psychological disorders, most notably multiple personality disorder.