I've never written such a character, and honestly, I don't think I will. Honestly I much prefer "near-death" scenarios, where everyone's freaking out about the possibility of the character dying. I find it's a much more intense and impactfull scenario if death actually isn't certain. I also feel that a lot of the time, people seem to kill off characters not because it would add anything to the overarching story or even the roleplay in general, but just to get some cheap tears. It's like a jumpscare: It's quick, initially shocking, but doesn't actually add anything and is for the most part forgotten about ten minutes later.
Or maybe I'm just a heartless monster with no capacity for empathy. I'unno, anything's possible.
It definitely depends on how the player writing handles it, IMO, and it also depends on the context. The reasons behind the character death are important, too. Etc.
Ideally, if you're making a character that's meant to die, the death should further either the plot or character development, even if that character's death is just meant to be a moment in a war RP where you realize "Oh shit, ANYONE can die in this setting."