So you're in the dungeon with Laios and Kabru because your teams had to split up... great, that's fine as long as none of them makes a fool of themselves....

Laios was just ranting about monsters like usual at least until Kabru told him to hush out of annoyance, and because the words accidentally let it slip out, this caused Laios to be confused and start asking questions, which lead to more agitation until it went into a full blown fight

Laios: "Come on! What did I do wrong?!"

Laios asked/yelled in confusion

Kabru: "You're talking so much that I can't hear anything else!!"

Kabru yelled this back in frustration

The bickering continued to go on and on