The Ace

In real life, it always feels like there's a million Aces who you'll never beat.

The one who's good at everything they do. They never fail (hard), are always a few steps ahead of their enemies, and are never the Hero because that wouldn't be any fun. They might look down upon the Hero, but they mostly stay by their side unless they give their "You Suck" Speech to the Hero and leave soon after.

The Ace can come in alternate forms. Their non-adventurous counterpart, the Main's Bane, is the Rival of the Main who often doesn't think of themselves as such, but has the better version of whatever the Main has: better home, better family, better business (if the Main's Bane runs one), and maybe even a better heritage just to Throw Salt On The Wound. Two other non-adventurous Aces are the Buddy and Luckster.