replied to your post
Could someone explain to me who the character in the top…”

@down-in-duckburg​ so i guess somewhat of a friendly rivalry then? since in the story shown above he actually assists scrooge in scamming both rockerduck and glomgold, hence my confusion.

Yeah, basically!  He’s not exactly a friend of Scrooge’s then again who is, but Scrooge has helped him out on occasion, and others he’s been a thorn in Scrooge’s side, but the impression I’ve always gotten is definitely more of the friendly rivalry sort.