Partial answers.
There's no romance in the novel. MC has zero love interests.
There's really no "enemies" of the flaming horn. There's just people that don't get along so well. Not like must exterminate kinda deal.
None of the well known members die.
Weather guy, Yang something, becomes leader of his tribe, rain tribe, was one of the big tribes long ago.
I don't remember the names of the central tribes all that well. There's one that has Giant mountain eagles, one that produces jade, one with spiders, one with all kinds of birds - feather tribe, Long Boat tribe. I really can't be bothered to dig up LNMTL for the full names.