I’m really not sure. On the one hand, Lobster is a fairly violent fellow, and frequently uses deadly methods in his war on crime. However, Usagi often has to resort to violence himself, and the Lobster never allows innocents to come to harm. I’d imagine that their relationship would be something like the one between Usagi and Sasuke (like Sasuke, the Lobster is a laconic hero who knows things with no explanation; Usagi would most likely be unsettled by the Lobster, like he is with Sasuke).
How would Inspector Ishida react? This is another difficult question. Would he try to hunt down the Lobster, or would he allow his actions to continue as long as no innocents came to harm? Ishida has been shown to be willing to take matters into his own hands if other methods would have failed, but would he be willing to tolerate someone like the Lobster?
Of course, this brings up the obvious question of how Lobster Johnson would react to his sudden appearance in a world populated by anthropomorphic animals.
Thoughts?