Grievous.

Which version of Grievous are we talking about? Because if it's Legends, then Grievous. If it's Disney Canon, then I would say Mahito.

It's canon Grievous.

@371841-DD Then I'm giving this to Mahito.

1. Grievous

2. Mahito/Sundowner

3. Sundowner/Mahito

4. Bayverse Sentinel Prime

5. Katana Man/Illumi Zoldyck

6. Illumi Zoldyck/Katana Man