[b]"Does anyone know what saga has puppeteer in it?"[/b] or [b]"What saga has puppeteer as a character or theme?"[

Sasori in Naruto is the obvious pick, but *what saga has puppeteer* could also be *Shinsekai Yori*!

The Fiends in that show are basically puppets of the system.

Also, *Higurashi* has some doll/puppet symbolism if you squint.

For searching, try "anime with puppet masters" on YouTube—surprisingly good recs there.