The universe of the manga Blame! created by Tsutomu Nihei is home to the following fictional characters and locations:
The Safeguard are a program independent of the netsphere. The netsphere was designed as a means of providing service to those who could log on. However, the netsphere was thrown into chaos (the actual reason is not exactly known, but the prequel manga NOiSE implies that a small group of humans is at fault) and the Safeguard changed their modus operandi from preventing unauthorized users from entering the netsphere to killing off anyone who does not possess Net Terminal Genes. The Safeguard have nine levels of hierarchy, Level 9 being the most powerful. However, their Exterminator (originally the lowest level safeguard) system has a different form of hierarchy where "First Class" is the most powerful.
You may not care but don't be naive
Well take The best The positive aspect
Have some friends and a punkska band
I guess that's The key to your sobriety
Even if you're a pervert use your head
Before you date this girl, you better sure you've bled
It's o.k. you'll do some mistakes
Like Ace Ventura with Snowflakes
Ohhhhhhhhhhhhhh!
Life is like diskathing
And someday you'll have a lovely wife
You'll do like O.J. and kill her with a knife
You'll obey to your bastard dog
Live across The street from a big fat slob
You will be a fucking statistic
Another man without a diploma
But after all you'll be happy
Cause you know man, this is The key
[Chorus]
[Bridge]
[Solo]
Ba-ba-ba, ba-Barbara ann!!! [x3]
[Chorus]