I'm writing a comic book about a martial arts school and one person suggested to me that my story may need a "quirk". He gave the example of the Tank Girl comic book. How she's kinda butch but kinda cute at the same time with heaps of huge guns. And there's also the Naruto manga/cartoon. Which is full of a school of ninjas as opposed to just normal people. I suggested that my character could struggle with obsessive compulsive disorder while fighting and he loved it. So, do I NEED a quirk to make it instantly appealing and unique to new readers? Cheers.