I haven't seen much berserk, but I'm thinking more along the lines of a companion character that you're glad is on your sideWhere's my boi, Guts?
He's badass, but I guess that thing is too big to be called a sword. Thick, heavy, and far too rough. Indeed, it's like a hunk of raw iron...
also as a quick addition to another archetype that I like, I really love comedic reoccurring characters that can tend to show up at the most random times, bonus if they're like a bumbling rival character like jr. troopa from paper mario or ultros from final fantasy 6