Kouichi Zenigata

Zenigata has made it his mission in life to arrest Lupin. He would love to arrest the other members of Lupin's gang, but Zenigata is really after the mastermind himself. Lupin and Zenigata appear to be the worst of enemies, but they are, in a manner of speaking, friends; something Lupin shows openly (often by greeting Zenigata with mock affection), but it is an idea Zenigata is extremely reluctant to entertain. Similarly, he is often awed by Lupin's genius but refuses to show it.

In the anime, Zenigata is a quite sensitive person and often cries in emotional situations, particularly when he thinks Lupin has done something out of consideration for him, or when finding out Lupin is okay after worrying about him. On occasions when Lupin appears to be dead, he mourns him more expressively than anyone else—partly due to genuine grief, partly because he no longer has a goal in life. Because of this singular ambition, he is never particularly displeased when Lupin manages to escape his custody.