The Last Blade Sprites Does Using Other Game Sprites As Reference Be Considered Plagiarism?

Does using other game sprites as reference be considered plagiarism? - the last blade sprites

I'm working on my game, indie-until recently. I am not copying the reasons the King of Fighters and SNK last piece of reference of my sprites, and just insert and they are about to do really new to scanning, and my own original character of them, the appearance of characters and no reference is designed by me, but also provides for other games that I do I use as reference the poses and animation a bit similar. My question is: Do not use other types of reference plagiarism?