It’s the hottest topic on everyone’s lips these days, and for a good reason: it’s one of Netflix’s most popular series to date. With such a compelling concept, excellent cast, and stunning visual design, the program made it difficult for viewers to look away from the screen. Despite this, there are still many aspects and undertones that most people don’t notice while cheering for their favorite characters. Red light! This list contains major spoilers.

Sae-byeok tried to hide her North Korean accent
Kang Sae-byeok, a North Korean defector and tough woman, quickly became a fan favorite. However, even with everyone’s attention on her, many viewers were unaware of this important fact about the character: her adaptable accent.

Those who watched the dubbed version or even those who saw the original but were unfamiliar with Korean were unaware of Sae-byeok’s accent adjustments based on her interlocutor. Her natural North Korean accent comes out when she speaks with her little brother, but she disguises it when talking to others so that she may blend in better.