Gurren shinigami volume 2

I am trying not to spoil what I wrote for my second volume
About the backstory of the villain I was kind of inspired by Koyoma Araragi from Bakemonogatari and Kizumonogatari of Nishio Isshin
I haven't found the light novel of Kizumonogatari but I read the plot
Also I got inspiration from the first three episodes of Gosick,an old anime series based on light novel which was made by one of my favorite studios,Bones
Naoko is named after the manga artist of Sailor Moon,Naoko Takeuchi
and Kaien is named after Kaien Cross from Vampire Knight and Vampire Knight Memories
I was also inspired by The Vampire Diaries for some details.
I hope you like it.