The 'scaramouche novel' could cover a wide range of topics. It might be set in a historical period, a fantasy world, or a science - fiction realm. If it's a historical novel, perhaps Scaramouche is a real - life figure or based on one. In a fantasy setting, he could be a wizard, a knight, or some other extraordinary being, and the novel would follow his journey through that magical world, dealing with magical creatures, political intrigue, and personal quests.
I don't know the author of the 'scaramouche novel' without more information. There are many novels with this name or a similar name, and different works may have different authors.
The Quinx Squad could react with a mix of respect and wariness. They respect power, and Kaneki has a lot of it. However, they are also loyal to their cause of protecting humans from ghouls. Meeting Kaneki would force them to re - evaluate their views. They might start to question whether all ghouls are truly bad, especially when they see that Kaneki has his own moral code. This could create internal conflict within the squad as they try to figure out how to deal with Kaneki.
Harley Quinn might get really into it. She has a wild and unpredictable personality. She could start to role - play some of the scenarios from the fanfiction in real life, much to the confusion or amusement of the other Squad members. It would be in - character for her to embrace this strange new view of their world.