The good doctor, Thomas Light (or Right). Idealistic yet brilliant, he is the father of modern robotics. His greatest creation, arguably, is X, although he would be nothing without the years spent with Rock, which were beneficial for both of them. Between games, Dr Light was responsible for upgrading Rock’s capabilities and building new helpers for him, including Rush the dog, Eddy the walking container, Tango the cat, and Auto the robot guy. He also previously built Blues as part of a military contract that resulted in the mass-produced Sniper Joe model. Also Roll.

Wily and Light used to be friends, even partners, before things took a deadly turn. Light has dedicated years of his life to combatting the schemes of Wily through his surrogate son, Rock. Years that could have been better spent improving the world. Still, all that fighting has simply increased his determination to help create a world where humans and robots can peacefully coexist.

Light’s other creations include the 6 (or 8) Robot Masters from the first Rockman game, and the 8 from Rockman 9.

Light’s next step, of course, was the creation of X, the first robot to have sophisticated feelings and free will. He sealed him in a special stasis capsule for over 30 years to test these complex systems, so as to bring X to maturity before releasing him into the world. He knew he would pass away before X could change the way the world views robots, so he hid capsules in many locations containing upgrades for him, knowing that one day X would find him. He also left hologram messages (second image) in these capsules to instruct X, his final messages to his creation. His influence was felt throughout this era, long after his death.

Light isn’t seen for a very long time after X (presumably) finds all the capsules. Unless you want to go with the endlessly recurring archetype theory, in which Weil is an incarnation or descendant of Wily and Ciel (and her mother) of Light.

The next concrete appearance of Light is hundreds of years later, in the Biometal era, when a council known as the Sage Trinity of Legion arises to rule a portion of the known world. They contain recreations or analogues of the three major roboticists from the Classic series, Light, Wily, and Dr Cossack, another good guy. Master Thomas (third image) is a strong, imposing figure, with a rigid moral code. It was he, along with Master Albert (the Wily analogue), who instituted a policy to bring humans and Reploids closer together in capabilities. Humans received cybernetic implants and Reploids had lifespans imposed, among other enforced alterations.

His hope was that this would create further cooperation and fellowship between the races, although it is revealed that this was but the first part of a more extreme plan that would involve more radical changes to society and its lifeforms. The exact nature of these plans is as yet unknown, but hints that there is a dark side to letting Light’s idealism reach to extremes.

There is a Network universe parallel to Light, known as Tadashi Hikari (being the Jaqpanese words for Right and Light, fourth image). He created the technology for projecting the NetNavis, although it was his son who actually created Mega Man and his grandson who would partner with him. He isn’t seen much, having passed away before the events of the first game. This version also wished for peace through the technology he helped create, although unlike Dr Light he left much work unfinished, to be continued by the next generation.