Jacob Babs

Jacob Babs is a vigilante operating out of Deacon City and has ties to and is a apart of the Justice League after being trained by J'onn J'onzz and Dick Grayson after his wife and son were killed while trying to leave the city.

The Guardian
In June 2016, Jake and his wife and kid tried escaping Deacon City during cartel occupation but were forced to go an alternative route after the only open route out of the city was turned into a battleground between Dark Force agents and Javier's Cartel. Jake was forced to use an underground escape tunnel that was run by Hal Jordan when it was raided by members of Javier's Cartel which led to an ensuing fight which led to Jake being the only survivor.

Between The Guardian and The Guardian: Brotherhood
After his family was killed, Jake escaped and was found by J'onn J'onzz who trained him along with Nightwing as J'onn stated to Jake that he is vital in 'a war that the universe has never seen before.' Jake trained for weeks under the watchful eye of Dick Grayson until he went back to Deacon City.