Pliable i think is the correct answer here
Your paragraph is perfect except that you should not capitalize the word "mythology".
Answer:
well, when a person is American, speaks in English American and is fully acquainted with American cultures and rituals.
The leader of the Gladers, Alby is the oldest and most trusted teenager in the Glade. Despite Alby's merciless enforcement of the strict laws of the Glade, he is a competent leader capable of inspiring loyalty and bravery in the other Gladers.