Final Fantasy 7 Remake: 9 MAJOR Changes We Can't Believe
4. Sephiroth's Clones Are Now Weird Wraith Ghost... Things
Covered in our wider look at the various story details that look to have changed, based on trailers, Sephiroth's clones are no longer hunched figures infesting Nibelheim.
Instead, they show up as invisible "spectres", somewhat attacking or otherwise bothering Aerith when you first come across her, and they only dissipate after Cloud touches Aerith, allowing him to see them too.
Point being: These creatures have been overhauled, and their role in the story will likely factor into Hojo's increased role in everything that's happening with Avalanche and the main crew.
We've seen Hojo keeping an eye on the party remotely, and though I didn't see the mad scientist in my hands-on time, the spectre... wraith things were a key part of Cloud and Aerith's first interaction.