Brief character description:
Although originally Nikola Tesla (famous scientist, engineer) died on 7th January 1943. In the alternative timeline, after discovering the fact that lightning consists of electricity, Tesla became obsessed with it, seeking ways to harness lightning to prolong his own life.
Eventually, he succeeded, at a certain cost. First of all harnessing lightning put a strong strain on his mind, causing him gradually to lose his sanity. Secondly his body began to deform, being unable to function properly because of huge amounts of power and stress. Thirdly his research attracted the attention of Nazi Germany, Schutzstaffel (SS) in particular. His unstable mind coupled with the obsession to prolong his life made him to join SS in order to find ways to further his research.