He uh... actually that's a pretty accurate description of Kuja in FF9 and across Dissidia, with a few variations. He was created as an adult and never had that emotional development stage to really sort himself out, but was sent to another world to create death en masse. In the end he felt terrible about it and doesn't think he deserves to live, but through Dissidia he decided he'd try a second chance and never really got it.

He's also... sorta dead in his world. I don't remember what happened in KH, but I think all of the Nobodies were killed? ;3; I was ver sad about that. Just means these two need to meet and discuss!