Here are the results for Round 4!
Maplerose had it easy, and used that to her advantage to guess all of the walls correctly -- on her first try, no less! Gaara-no-Shukaku and Piccolobear also scored highly; in all, 4 out of 7 guessers got a 50% or better on their first list.

Here's who made each wall:
Wall 1: Maplerose and Kitten
Wall 2: Maplerose and Mirinee
Wall 3: Maplerose and Gaara-no-shukaku
Wall 4: Abul and Piccolobear
Wall 5: Myrhhlynn and Piccolobear
Wall 6: Gaara-no-shukaku and Kitten
Wall 7: Maplerose and Chloe-chan
Wall 8: Myrhhlynn and Piccolobear
Wall 9: Chubbykitty and BBshadowneko

Here's a breakdown on how guessable each wall was: