Hero with Bad Publicity: In Act II. By the time of Act I, it's implied Wily kept him around because he still made for a good scapegoat.
Humans Are Special: Light believes this. Unfortunately, this only seems to be true for a few individuals.
It's All My Fault: "They will punish me for what he did to you/but either way, it's all my fault/because I made the man who laid his hands on you..."
Knight in Sour Armor: After Protoman dies, he outright says that "Mankind deserves the hell that they have brought upon themselves." However, this doesn't stop him from building another son and leaving inspirational words on Protoman's grave.
Made of Iron: In "Father of Death," he breaks his arm in a fall... and apparently walks it off, as it's never brought up again.
Tragic Hero: Light's passion for saving the city and its people made the entire plot possible, including the deaths of Emily and Joe, Wily's takeover, and Protoman and Megaman's disillusionment with the City.
What Happened to the Mouse?: Between the releases of the Acts, it was never established if he died with the crowd or if he somehow escaped. The lyrics in "Hold Back The Night" and Panther's testimony show that he left before the slaughter.
Wide-Eyed Idealist: He believes in the good of people. However, he underestimates the power the media has over the people, and since Wily takes advantage of this, it leads to his downfall.
Charm Person: He convinces the entire City to go along with his words, including trying to kill Dr. Light.
The Chessmaster: Some kid on a bike attacking the control tower? It's no problem; you have another one. Protoman attacking your complex? No problem, send out all the Robot Masters to attack him at once. Megaman attacking, this time getting to the fortress gates and possibly threatening you? Send out Protoman to deal with him.
It doesn't matter where you hear it from; whether truth or lies, it gets said all the same!
Dangerously Genre Savvy: He built another control tower in case the one he was using was attacked, and then used that as an excuse to declare martial law. He then sent all the robots out at once to attack Protoman, then sent him out against his brother.
Spontaneous Crowd Formation: They gather to lynch Dr. Light, and crowd around Joe's body after his Heroic Sacrifice in Act II. In Act I, they gather at Protoman's assault on Wily's fortress, when Megaman reads the words on his brother's grave, and when Megaman attacks the fortress.
Too Dumb to Live: Yes, growing up in a police state does tend to mess with the heads of the populace, but all the same, what could possibly make them think that telling their single, superpowered defender, currently mourning his brother who he just killed on their behalf, that said brother deserved to die is a good idea?
Face-Heel Turn: After "dying" in Hope Rides Alone, he changes sides and decides that if humanity deserves to live they should fight for themselves.
Fallen Hero: Changed sides after his death, when his beliefs were crushed.
The Fatalist: Subverted in that, while he's a fatalist, he desperately wants not to be and is constantly fighting to have his philosophy proven wrong. It's too bad that every time he does, the crowd's actions just reinforce it.
Large Ham: Live, at least. A couple of times he imitated pro wrestler Rick Flair.
Machine Monotone: His lines in The Stand begin to be consumed by one as he goes from talking with his brother to trying to kill him. By the time The Sons Of Fate begins, his voice is deeper and more hateful.
Adaptational Badass: Could apply to any one of the re-imagined characters in the rock operas, but if the music video footage of 'Hope Rides Alone' is to be believed, the Robot Masters have become terrifying figures; Elec Man in particular.