The Resistance 
(RES, colloquially known as smurfs) is one of the two factions in Ingress, represented blue within the game. Where the Enlightened 
are convinced the Shapers are trying to help humanity evolve, the Resistance believes Shapers are here for their own purposes and want to protect humanity from the Shaper influence. As a result the Resistance and Enlightened are in a constant state of war for control over portals and mind control fields.
All of the Resistance's Portals, Links, and Control Field Δ will appear blue on the Scanner.