These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
This also stretches to Afro's father, the least focused on and developed character in the series despite being the source of Afro's motivation. It's implied that Justice kills him because his father refused to do anything with his authority and instead wanted to quietly retire.
Freud Was Right: In the anime, Afro Droid's ultimate weapon is a large, chest mounted Wave Motion Gun that is very suggestively shaped. The manga version is even worse since, though not as large, it is actually crotch-mounted and dangles when not in firing mode.
In the anime, Afro Droid even screams out as he fires it.
Ethnic Scrappy: Ninja Ninja Is a likely an aversion of this. He is the repressed side of Afro, also voiced by Samuel L. Jackson and thus is intentionally different. Also, he is often more help than harm, as in the anime it is hinted that Afro would be lacking sanity if not for him.
The Woobie: Jinno. Life just doesn't seem to want to be kind to this guy. The closest he gets to a happy ending is dying for Afro. Which isn't much of a happy ending at all, depending on who you ask.
Moral Event Horizon - You may think that it doesn't get much worse than using a young boy as a human shield against a group of ninjas, until Afro uses the dead boy's crippled sister as a shield against a man toting a minigun.