Cisco Ramon is a mechanical engineering genius and the youngest member of the S.T.A.R. Labs team.
He's the gadget guy and responsible for The Flash's iconic red suit. Cisco also has a thing for giving metahumans code names, a fact that amused the future Captain Cold. Like Barry Allen, Cisco is a comic book fanboy and his youthful energy is highly contagious.
Caitlin: Ronnie's alive. I saw him Cisco. I think he was following me...
Cisco: Caitlin, Ronnie died. He was vaporized in the accelerator when it went critical.
Caitlin: Ronnie's alive and he's out there, alone and scared and I need your help to find him.
Felicity: I'm glad I decided not go go bra-less.
Barry: Guys, you remember Felicity.
Cisco: I'll always remember this.