Creation
Griffin was created by Paul Tobin, Remi Aubuchon and Katie Altman as a character for the comics of “Falling Skies”. He never appeard in the TV series.
Falling Skies: The Battle of Fitchburg
After the invasion of the Earth Griffin joined the 2nd Mass at some point. He was out on a mission with Hal Mason, Camille, Margaret, Henry and a few other fighters but the mission failed. Shortly Henry got killed by a Mech and Hal and the others fled into a Diner. Only Griffin and an unnamed fighter trief to fight against the Skitters and Mechs. Both of them were presumed killed during the attack.