Sylphleel

Sylpheel or Syl for short is being perceived as a god from humans, perspective.

Syl accidently killed Takumi when he used his powers to mend a rift in space-time, he accidentally used too much power and ended up hitting Takumi, who happened to be on the other side.

As an apology Syl created a new body for Takumi and transmigrated him to the world that Syl manages called Aetherdia.

Syl gave Takumi basic knowledge of this world, it's language, and various skills have been instilled into his body.