Third from the left
Johnny Moreno was a member of Taggerdy's Thunder, an elite United States Army Ranger unit. Bearing the rank of Corporal, he was the unit's communications specialist. After the Great War, with the collapse of society, Moreno was responsible for monitoring communications, looking for survivors of any kind, especially military ones. He happened upon Roger Maxson, broadcasting to Appalachia via satellite and looking for anyone alive there. The chance encounter led to the foundation of the Appalachian branch of the Brotherhood.
Moreno remained as a communication's specialist, participating in field recovery expeditions. On one of these expeditions, he found Tex Rogers, who volunteered for the Thunder. Although he did not seem like much, Tex proved to be the right fit and received the first training commendation Ted Wilson gave since the Great War, eventually joining the Thunder as a fully-fledged Ranger.
Moreno's eye for talent didn't translate into command talent of the same grade. Assigned as field commander of the Grafton Dam outpost, he was tasked with holding the passages through the Divide to the Mire and ensuring a link with Harpers Ferry. Although competent, many of the soldiers serving under his command had doubts about his overall capability as a leader. When the Grafton outpost was mothballed, many were relieved - including, apparently, Moreno.
When Taggerdy launched Operation Touchdown, in a desperate bid to get rid of the scorchbeasts once and for all, Moreno volunteered. Tasked with maintaining a connection to Fort Defiance, Moreno relayed intel as they were hitting the coordinates provided by Scribe Grant's tracking device. If it wasn't for the damage to the transponders on the way, the Brotherhood would learn that Taggerdy, Moreno, and the rest of the task force tracked down the scorchbeasts to the glassed cavern. As it stands, Moreno fell there together with the rest of the task force, buying time for the Brotherhood - but little more.
Johnny Moreno is mentioned in Fallout 76.