A Berwald is an extremely tall guy, usually with blond hair and glasses, who keeps a scary expression most of the time. Underneath his scariness, he is a real sweetheart and is very reliable. Berwalds have a tendency to claim people as their "wife" and will most likely stay with and protect that person with their lives.
Person 1: I met this scary guy at IKEA, but he was such a sweetie.
Person 2: He must be a Berwald.