Doesn't really apply to real robot shows. In Super shows, characters are literally powered by emotions. The death of a friend creates a huge surge of emotions that will drive a super character nuts. Real characters tend to act rationally, and will be changed by a death (who wouldn't) but won't really be empowered by it.
My favorite example is in the last episode of Gaogaigar, when Mamoru "dies" and Gai FLIPS THE FUCK OUT.