I believe HE is called Hazama, not Kazama ;P
Awesome thread BTW.
Here is a small contribution [SPOILER WARNING]
In Shin Megami Tensei if... we have an astonishing character called Ootsuki. An ordinary guy with a weak body, who spends his time in his laboratory.
He is constantly repeating -to whoever wants to listen or not- that the human body is build up of plasma and thus blood vessel. That's why he must never go out without defense.
He thinks purely as a scientific and through his delirium he came up with some foolish ideas.
He simply wants to become stronger than the common human beings made of plasma.
Rapidly beaten in the Makai (the demon world), he joins hazama/Majinnou's side and becomes his right hand.
Of course, stupid Ootsuki is still weak and doesn't realize that Hazama is manipulating him. Nevertheless his foolishness and scientific madness in his conquest to become stronger drives him to implant various pieces of metal into his body.
The 2nd time when the player meets him, he is proud to show his "healed" body with a metal arm. The next confrontation can be different depending on the player's partner, but in general Majinnou will order the player to go and destroy his own pawn Ootsuki. In fact Majinnou is always considering Ootsuki a weak being, a trash of some sort who is seeking a power which he will never get.
He is destroyed easily for the 3rd time dispite his new "plasma power" as he claims it. He justify his defeat because his not perfect/complete yet.
When the hero comes back from the Makai's center, Ootsuki's finally finished remodeling his body. That didn't prevent him from being demolished again, easily.
I love this character because he's a reference to Shinya Tsukamoto, a movie director known for his very experimental work based on sadomasochistic insanity and corporal mutations to gain power.
Ootsuki not only reminds Tsukamoto's works but also Tsukamoto himself who often plays the protagonist in his films.
Other than that Ootsuki plays a redundant role in SMT if... like Daleth in SMTII or Ramsus in Xenogears, the definition of a looser who never reaches his goal. He's nevertheless impressive with his strong will, his madness and attraction for metal.