Answer:
The character from Achebe’s "Things Fall Apart" which is best described as the protagonist’s foil is Unoka.
Unoka is Okonkwo's father.
Step-by-step explanation:
A foil character is a character which stands in contrast with the protagonist. In the story "Thing Fall Apart" Unoka is the foil character of Okonkwo. These two characters are not alike. They always have opposing views and thoughts. A foil character helps in highlighting the qualities of the other.