Actress So Yi Hyun is the very definition of girl power in her role as a presidential police in "Three Days".

She plays the role of Lee Cha Young, one of the most elite agents in the presidential police team. With her character's tough and serious personality, many were surprised when the production team released behind-the-scenes pictures of the actress showing her cute and adorable side.

So Yi Hyun revealed, "Being a part of such a big production drama is both an honor and a burden. Before we started filming, all of the actors who will portray agents underwent rigorous training. I took my training seriously in order to give my best acting for this drama."

On her impression of her role, she shared, "In her team of agents, Cha Young is considered to be the smartest. Being a police officer, I try not to act so feminine when I'm portraying her."

In the drama, her character is caught between protecting the interest of the state and other presidential agents, and uncovering the truth regarding Han Tae Kyung's involvement in the mysterious events surrounding the president.

Catch So Yi Hyun in "Three Days" every Wednesdays and Thursdays on SBS.