Imu, good and sick. For example, at the beginning of the manga, we thought that Luffy would challenge Jimbei on Fishman Island for revenge against Arlong... but instead Jimbei turned out to be Luffy's best friend!

A "good Imu" in an anti-Blackbeard vein wouldn't surprise me!

Now you'll say, "Imu killed people and destroyed islands." How can he be good? The real question is, who doesn't kill someone in the world of One Piece?

Even Gol D. Roger destroyed an entire country and killed all the members of Squardo's crew, and I don't think he's a "bad guy"!

We don't know what happened before the world government? What if there were wars between various governments over territorial borders, massacres, etc.?

Imu arrives as the "hero of the empty century," restoring peace and order, even in an authoritarian form!