Yamato has narrative to fight Kaido. 6
Barring Luffy (because he's the protagonist) Yamato has the strongest narrative to fight Kaido. If you're unwilling to read the thread, Yamato's reasons for fighting Kaido:
You can change #5 to: "she wants to protect Momonosuke".
As for Yamato abandoning fighting Kaido and trusting in Luffy, it cannot happen at this juncture. Yamato didn't believe Luffy could defeat Kaido by himself, it's why she was hurrying towards the Rooftop to back him up. She wouldn't start randomly believing in him when he confirmed her lack of faith and reinforced her belief that Kaido will always prevail in a one on one.
Barring Luffy (because he's the protagonist) Yamato has the strongest narrative to fight Kaido. If you're unwilling to read the thread, Yamato's reasons for fighting Kaido:
- She wants payback for decades of abuse.
- She's disowned him as a Father because he was willing to kill her.
- She declared "Let my Father die".
- She wants to fulfill Oden's will to open up Wano.
- She wanted to assist Luffy on the Rooftop.
You can change #5 to: "she wants to protect Momonosuke".
As for Yamato abandoning fighting Kaido and trusting in Luffy, it cannot happen at this juncture. Yamato didn't believe Luffy could defeat Kaido by himself, it's why she was hurrying towards the Rooftop to back him up. She wouldn't start randomly believing in him when he confirmed her lack of faith and reinforced her belief that Kaido will always prevail in a one on one.
Nothing indicates she will fight Kaido until he's defeated. She can have their major encounter whenever it's needed, to which then Luffy can take over when he comes back.
Law was warranted to fight Doflamingo until he lost, twice in fact. Luffy then took over.