Raymond "Ray" Palmer ~ "The dawn of the computer age, developers thought the only way a machine could process information as fast as a human brain was to build a mainframe the size of Texas. But one developer realized that the only way to reduce heat and power consumption was to bring the components closer together, which meant making them smaller. But why stop at computers? What if it could take other things, like, say, all of the military-grade technology in Applied Sciences, and make it smaller, too? So small that it can fit in the palm of my hand. I can help a lot of people that way".

Dr. Raymond "Ray" Palmer (born 1981) is a businessman and the CEO of Palmer Technologies, formerly Queen Consolidated. Ray was engaged to marry the late Anna Loring and later dated Felicity Smoak, a clandestine member of Team Arrow, although the relationship did not last. Having designed a powerful exosuit, he began acting as a vigilante in Starling City, calling himself The Atom. While testing out a new function of his exosuit, Ray accidentally caused an explosion which shrunk him to miniature sizes but he was believed dead. After months Ray managed to contact Felicity but was captured by Damien Darhk for his technology. However thanks to the efforts of Team Arrow Ray was rescued and continues to aid Team Arrow.

Spoilers Ahead!!!