What Hides Underneath

After the Decpticons and Autobots came to earth they made Holoforms before they changed their ALT modes. They all have used there Holoforms, even Predaking! But only one SIC has never once used his, So why does he not use his Holoform?
Hating Humans? Or hating what secrets it reveals?

Own Au, I dont own transformers, Hasbro studios own Transformers, I used Canva for the Cover and Not Cannon. In this a ONESHOT and my first book so feel free to give me some ideas to make my stories better!

Enjoy