Luke is fullfilling the most important role in the party. It may not have an official title, but it's the person who makes stuff happen. Sometimes, people get bogged down in "should we do x or y" or "I don't know I think this situation has more nuance to it and we should make a plan" when really what is needed is someone saying "I punch everyone and everything in the face." That's what makes games happen.

"Catalyst" might be the term you're looking for.

In the most prominent case of this in any campaign I've taken part in, the technical term for the sort of person who does this is "bored and a little drunk".

When the Evil campaign has been bogged down in busiwork quests because everyone wants to play it safe...

That's when the Orc attacks the mob boss! Who turns out to be a dragon.

That was a fun one!

i don't know if anyone can row with enough strengh to get away from this without breaking the ship by rowing with too much strengh.

I suppose a stretchy dude could flatten himself against the back of the ship to spread out the force across the ship and then stretch his arms out to row with a very large oar? *shrugs*

You can't row with stretched elastics, they'll retract without a foundation at the other end. You need something that remains long and stiff as you drag it through water.

Seriously, why is s/he the leader? // Anytime story that the question was asked?

Nami was built as an independent thief, Zoro has undying loyalty as a flaw, Usopp is a new player, and Merry is a boat. Also, she's on her second character. He defaulted into it.

We had this in a short campaign i played a whileago. The player who ended as the leader was not the best at planning, and tended to quickly lose patience if negociation with a NPC dragged for too long. He also sometimes forgot plot details (but he just asked one of us to remind him of theses when that happened).
But we where playing a family, he was the father and the only party memeber who was'nt underage.

had a campaign where the first leader only showed up to the first (and possibly second) session, with the second leader being one of the "I'm not evil I'm chaotic neutral" evil characters who ended up joining the big bad. To be fair, aside from that original "leader", there were 2 evil characters, a rogue style character with questionable morality who didn't really get along with anyone and the guy who got knocked out once

Had a 2 player 3.5 Campaign where the 2 of us were, extremely dim, wandering missionaries for an evil god, mistakenly believing he was one of the good ones.
Found it kinda odd the way he sometimes demanded sacrifices, but hey who are we to question a God?

Early into the campaign, we meet a blatantly evil wizard(DMPC) who convinced us he was an oracle for our god, and began to lead us in many horrible acts to create a grand temple of bones to our god (really a palace for himself).

Keep in mind, this was not originally supposed to be an "evil" campaign, and our characters never learned any better, so they were still "good" characters.

Hmm.

Innocent observation from Jayden? But it’s a bit jerky the way he said it.

Well he did prevent them from crashing into the whale right before that.