Uzumaki Nanoha has never been afraid of anything in her life, from a little bear to a grown-up; even if someone is strong enough to torture her, she can still attract hatred with a look like "you are trash".
However, despite this, Uzumaki Nanoha also has two things that she fears the most: Uzumaki Kushina's fists and Uchiha Mikoto's tears. As soon as one of these two things comes out, the naughty child will immediately turn into a little sheep.
The heroine has been dissolute and hateful throughout her life, but the whole story is joyful (spoof). Basically, everyone who died in Naruto did not die. This comes from the author's deep resentment towards AB.
The male protagonist... Is probably Shisui, but since the author is not very good at writing emotional lines, it is very likely that there is no male protagonist at all.