1. List up to 20 characters that you like to write. (Original characters are welcome)
2. Ask your friends to comment to this post with questions directed to the listed characters.
3. Reply to your friends' questions in character inside your own "head canon."

1. Touya Kinomoto (CCS)
2. Kero (CCS)
3. Regulus Black (HP)
4. Salazar Slytherin (HP)
5. Helga Hufflepuff (HP)
6. Ozma (Wizard of Oz)
7. Pel, Duke of Galstan (Dragaera)
8. Vladimir Taltos (Dragaera)
9. Edmund Pevensie (Narnia)
10. Shasta (Narnia)
11. Maedhros Feanorion (Tolkien)
12. Denethor (Tolkien)
13. Auron (FFX)
14. Jecht (FFX)
15. Gippal (FFX-2)
16. Vossler (FFXII)
17. the Judges Magister Gabranth (FFXII)
18. Judge Magister Drace (FFXII)
19. Gramis (FFXII)
20. Reddas (FFXII)

And if you cannot find someone on this list from a fandom you are interested in, I declare myself confuzzled. (Or maybe I just don't have much headcanon for them.)