ElMonoEstupendo

Correct! The thunderclast that tore down Thaylen City's wall and plundered the Gemstone Reserve.

Not Jezrien. Not Raboniel. Not Szeth. Not Kelsier. Not Shai. Not Amaram. Not Lightsong. Not Morriumur. Not Ashravan. This character has been reborn. This character stole a fabulous treasure. This character almost killed a hero. This character was permanently killed, a thing not previously thought possible. It took Jasnah, Lift, and Szeth to undo this character's work.

I'd be up for Secret Project characters, but I think there's probably quite a few people who haven't/don't want to read the sneak peeks ahead of the Year, so I'd say no for now. Not Szeth. Not Kelsier. Not Shai. Not Amaram. Not Lightsong. Not Morriumur. Not Ashravan. This character has been reborn. This character stole a fabulous treasure. This character almost killed a hero. This character was permanently killed, a thing not previously thought possible.

The boy in Bridge Four that reminds Kaladin of Tien.

Not Shai. Not Amaram. Not Lightsong. Not Morriumur. Not Ashravan. This character has been reborn. This character stole a fabulous treasure. This character almost killed a hero.

I know, right? Not Lightsong. Not Morriumur. Not Ashravan. This character has been reborn. This character stole a fabulous treasure.

Callooh! Callay! This character has been reborn.

Kaza!

Valam? No, too human. Vin?

Nohadon.

The Lopen.

Correct! Your turn!

Not Vasher. Not Marsh. Not Wayne. Not Kazan. Not Spensa. This character takes shortcuts. This character is mistaken for someone else. This character is bad at conversation. This character's name is ominous. This character's name is also slimy. Bonus Clue: This character has a cousin with a similar name. Who explodes.

Correct! He had the half-shards too, and a secret Shardblade.

Not Gavilar. Not Taravangian. Not Leras. Not Kelsier. Not Szeth. Not Khriss. Not Vathi. Neither of the Vyres. Not Allik. This character wields new-fangled technology. This character is one part of a grand plan. This character saw their death coming. This character's successors were quite a disaster. This character laid a trap for their assassin, but failed nonetheless.