I Can Replace Anything

Jiang Ran was chosen by the Clock Tower of the Myriad Heavens. He enters all kinds of worlds to complete their main quests, and his talent lets him take the form of any creature in those worlds. So...

In Demon Slayer, he is Tamayo.

In Genshin Impact, he is a Fatui Debt Collector.

In Jujutsu Kaisen, he is Takuma Ino.

He has witnessed the greatness of countless empires, sages of the ages sacrificing themselves for the world, the calamity lurking behind the so-called sacred stones, and a world being born from nothing.

He has fought in the war between light and darkness, guarded a nation all by himself, answered his followers’ prayers as a god, and brought a thousand-year feud to an end.