Dan/Loki
I've been inside his mind. Higgs' mind. I saw some of his memories, before he knew I was there.
His son's soul (and others, but he's mainly concerned about his son) is being trapped by five of those Watcher things I warned you about before, but he calls them Shards, and he says his purpose is now Unification. I don't know if there are supposed to be more than five, that's just how many I saw. And he says the Shards only exist because of something we've done. Once Unification happens, it'll free the souls.
He's died so many times, and come back, and it's driven him insane. Because of those Shard/Watcher things. Whatever's going on, it's because of them.
That's a brief summary. If you want all the details, you can come round to the house and check my memories.