Naruto: White Zetsu from the Start, Unlocking the Copy System

Bai Fei transmigrates into the role of a cannon-fodder White Zetsu. Luckily, he gets a Copy System: all he has to do is possess someone to copy their abilities.

Bai Fei: Why not copy Kamui right away?

But the System won't accept forced possession! The target has to agree to be possessed before the copying ability can activate!

Bai Fei: Who would ever let me possess them willingly?!!!

Wait! There actually is someone: Kushina, after Obito extracted the Nine-Tails from her!

Bai Fei: Nine-Tails Chakra, here I come!!!

Bai Fei: I need to disguise myself a little. How else am I going to get people to agree willingly?

Kushina: That senior sacrificed himself without hesitation to save my life!

Minato: That senior is a hero!

The Third Hokage: This is the Will of Fire!

Danzo: How did I not notice this person sooner? And now I can't even make him work for me!

Obito: Wait, where did this guy come from? So I did all that for nothing?