
Azmodan is the friend no one wants
From here, things get a little complicated, as the remaining characters are hardly implementable as drivers. However, they would have quite annoying habits as players that would quickly ruin your enjoyment of the game. Imagine them as friends who game with you.
Azmodan is the Lord of Sin and responsible for anything that can be considered sinful. He is also the general of Hell and commands countless legions. However, he rarely acts himself but watches from behind.
Correspondingly, Azmodan wouldn’t compete against you himself, but instead let his little brother play, who knows every track five times better than you, has much better reflexes, and is better practiced. Meanwhile, Azmodan just watches, eats cake, or makes out with his girlfriend – but would still sell his brother’s victory as his own in the end.
Baal just wants to see the world burn
Baal is primarily known as the end and farm boss from Diablo 2:
The perhaps worst gaming companion is Baal, the Lord of Destruction. He doesn’t care about winning, not even about playing. He just wants to destroy everything.
So what would he do? Simply turn off the console in the middle of the game. If the data gets corrupted – that’s your problem.
Belial, the smooth-talking friend with the silver tongue
Belial is the Lord of Lies and as a demon not very strong, compared to brutes like Diablo or Mephisto. However, he is extremely good at deceiving people and takes great pleasure in it.
When gaming, he would stubbornly drive in the opposite direction from the start and claim that the indication that he’s driving the wrong way is a bug. He would be so persistent and annoying that eventually, he convinces everyone to drive the wrong way too.
The Butcher is the friend Mom always warns about

Among the most well-known opponents in Diablo is the Butcher, a boss from the first Diablo game, who with his “Fresh meat!” cry has often caused terror. In Diablo 4, he can even simply ambush you in the middle of a dungeon.
As a friend, however, the Butcher would be rather… strange. Butcher demons are known for hacking up everything that is living.
If you translate this to Mario Kart, then the Butcher would be the one friend who stabs controllers in his room and guts consoles, displaying everything beautifully. Like… no one else had such a friend?