Barry Allen “Savitar” (Arrowverse Earth-One)

Savitar was one of the many time remnants of the original Barry Allen/The Flash from a possible future in the year 2020 or 2021 in the Post-Flashpoint timeline, created to help him fight his enemy Savitar in vengeance for killing their fiancee Iris West. However the prime Barry failed to defeat Savitar who slaughtered all the time remnants except for this one. After surviving his encounter Barry was shunned by his prime self, Joe, Wally and Cisco for not being the "true Barry Allen", and was disregarded as a time aberration and a "disposable hero". Grief stricken from Iris' death and isolated from his family and friends Barry was driven insane and sought to end his pain, coming to a realization that "God feels no pain" and aspired to become one.