When I enter "blinded," I am offered the film "blinded by desires." I couldn't link it to anyone, but I think it's worth investigating further. Regarding 1956, the date "January 3" is repeatedly mentioned in the Wikipedia article. And January 4 is the date Dag registered :D.
Several people have already agreed that Dag is suspicious. But I can also vote for Neira.
Цикл "Закадычные враги": "Особенное гостеприимство, "Супероружие", "Меж молотом и наковальней"
"Падение Шантири"
Кампания для "Кодекса Войны"
"Выбор Сагиттеля"