The shinigami redivivus

I never expected myself to live again after being killed by a car. I awoke in another world, full of Gundams and as one of the Gundam boys, Duo Maxwell. Why am I Duo, of all people? And worst of all, why do I have to be a child soldier and fight a war and be the opposite gender? Someone up there hates me. Self-insert. OC reincarnation. Somewhat anti-hero OC, being rewritten.