He has so much respect for the dwarven race that he has turned the treasured sword into an axe, the favored ancestral weapon of the dwarves. Truly, he has a great respect for dwarf-kind.
Watch the axe be the original form of the weapon, and it got worn down to a blade due to zero upkeep by the Adventurers Guild. It was already brittle enough that the Guild Master was able to sabotage it easily.
He can do all that when fighting, but can't defend himself from girls attacking him.. His resolve is weak, but it brings us ecchiness.. I'm conflicted.
Something something an Axe can deal a heavier blow than a sword so it was required to change its shape for it to pierce the heavy armor of the new mole monster thing.
The dance is an ancient japanese meme from a page of some shojo manga called Haou Airen, from a page that seemed as if it was supposed to look cool, but ended up looking pretty silly.
Nevermind the fact that he just singlehandedly saved us from a cataclysmic disaster of a monster... Let's get mad at the guy because he reforged a weapon.