Class & Companion
Sith Inquisitor - Xalek #6
Xalek's customizations come from the Security Key Vendor in the Ilum Orbital Station. They're two variants on his mask without the horrible beige hood. One is slightly plainer, the other has extra spikes and more war paint.
Companion Customization & Planet
Ilum
1. Andronikos Revel #8
2. Ashara Zavros #1, 2
3. Blizz #5
4. Broonmark #5
5. Doctor Lokin #8
6. Ensign Temple #8
7. Gault #1
8. Jaesa Willsaam Dark #1 & Light #5
9. Kaliyo Djannis #8
10. Khem Val #4, 9 & 14
11. Lieutenant Pierce #8
12. Mako #8
13. Malavai Quinn #8
14. Talos Drellik #3
15. Torian Cadera #8
16. Vector #2
17. Vette #2
18. Xalek #1 & 2 at 35,000 CR each