They could be a secret group of ninjas from a far - off land that has a connection to the wizarding world. Maybe they found Harry as a baby and decided to raise him as their own.
One possible reason could be that he has had some extremely traumatic experiences with certain ninjas. Maybe he witnessed a powerful ninja going on a rampage and killing innocent people, which left a deep scar in his mind, making him fear ninjas in general.
The 'spy ninjas novel' likely involves a story full of mystery, action and adventure. It might center around characters who are ninjas with spy - like skills, going on secret missions, facing villains and saving the day.
I'm not sure exactly, but 'Night of the Ninjas Fiction' could potentially be a story that explores the world of ninjas under the cover of darkness, perhaps with elements of combat, strategy, and intrigue.
Perhaps he blames ninjas in general for the loss of someone close to him. For example, if a group of rogue ninjas were responsible for the death of a dear friend or family member, it could make him resent the whole ninja concept. He might think that if there were no ninjas, such tragedies wouldn't occur.
The pregnancy could also add an interesting twist to their ninja adventures. Instead of just fighting villains, they now have to think about the safety of their unborn child. They might even train their future child to be a supah ninja from the womb, with Amanda doing special prenatal exercises that are also ninja - training - like, and Mike talking to the baby about the importance of honor and justice in the ninja world.
It's difficult to say precisely what 'rwby ninjas of love fanfiction' is about without actually reading it. However, generally speaking, it likely takes the RWBY setting which has its own lore, characters, and powers. Then it throws in ninjas, which brings in aspects like stealth, katana - wielding, and ninja techniques. The 'love' aspect is probably there to add an emotional and romantic dimension, maybe showing how a character's feelings for another impact their actions in this RWBY - ninja hybrid world.
There might be a young and inexperienced ninja who is learning the ropes. And perhaps an old and wise ninja master who guides the younger ones. There could also be an antagonist, like a powerful and evil ninja from a rival clan.
The 'ninjas graphic novel' could feature detailed art that brings the world of ninjas to life. It might focus on the stealth and combat skills of ninjas. There could be a story about a young ninja's journey to become a master, filled with challenges and lessons along the way. The graphic novel might also include elements of Japanese culture related to ninjas, like their weapons and clothing.