zenarin

Each series has a character that can be asked the question Vin asked Kelsier in Secret History - "Was all the protecting others thing really about them, or was it more about you?" Kelsier. Kaladin. Kenton. There, all of them start with a K. Rysn is a Ceaser cipher of Hoid. Zahel rhymes with Nahel, considering he considers himself more of a spren than a human?

From the top of my head (I haven't read Elantris and Warbreaker) - 1. Felt - Originally Elend's Spy. Seen on Roshar. Brandon's said there's a reason why he's not really noticeable, my theory is he's a Soother/Rioters who either Soothes suspicion or Riots trust 2. Malli - Felt's wife. Suspicious? 3. Nazh - The mapmaker who travels with Khriss literally is everywhere. 4. Khriss - Noticeable if you've read White Sands. Probably knows more about Investiture than even Hoid. 5. Frost - I think he'll be important but has only been mentioned in a single letter. 6. Characters like Teshav and Gen. Khal and family - Though they've very little screentime, whenever they're shown they're badass in their own ways. I doubt they'll have an important role going ahead, but they already have important "shadow" roles. 7. Rushu - Herald? 8. Thude. 9. Aarik, Baon - Noticeable yet their Investisture hasn't really been explored. 10. Autonomy - insane? 11. Allomancer Jak, Nicelle? - Idk I've always felt Leechers are excellent worldhopping material. 12. Cultivation - 4D Chess anyone?