What is the Monas signature weapon?

Excuse me, could you please clarify for me what you mean by the "Monas signature weapon"? Is Monas a character or entity from a particular game, story, or fictional universe? If so, could you provide some context about the setting or genre? Without that information, it's difficult to give an accurate description of a "signature weapon" as it would heavily depend on the world and rules established within it. However, in general, a signature weapon is typically a unique or distinctive piece of equipment that a character is known for using or that defines their fighting style in some way.