You'll have to excuse my prying, but I've never heard of a Herrscher, so you should start there.

[Unless it's just a very fancy way of calling someone a hero, which... is entirely possible. The closest thing Midna has for comparison would be those chosen by the Gods of Hyrule, but even that could be a stretch.]

Although it sounds like you're a warrior, a... soldier, perhaps, who acts when you choose to for the notions you choose to uphold. A mercenary, maybe, if you haven't been inclined to pledge your loyalty to some one else.