Kim Hyun-min / actor Koh Joo-won
A ship designer at Dongjin Heavy Industries who is obsessed with ships.
He currently works as a ship designer at the design arm of Dongjin Heavy Industries. Later on, he becomes a key ship designer and the company regards him as an important asset. Chairman Jang of Dongjin puts his trust in him and Hyun-min displays a strong character with healthy values. His dedication in designing ships goes beyond making commercial tankers. He also designs destroyers, frigates, submarines and aircraft carriers.

Yoon Se-ra / actress Park Sol-mi
Team member, Shipbuilding Department, Planning Team, Headquarters, Dongjin Heavy Industries
A woman with an evil streak that she hides behind her angelic face. With her stunning looks, she is also fluent in English, Chinese, and Japanese. She has an inferiority complex about being from a poor family and she works hard to become a member of the upper class. She is obsessed with becoming an elite ember of society. She pours her energy into learning new languages to raise her social status.
She dearly loves Kim Hyun-min and plans to marry him.

Jang Tae-sung / actor Park Jung-chul
Eldest son of the founder of Dongjin Heavy Industries and future successor.
His ambition is to make Dongjin Group, which is currently ranked as number 50 in terms of revenues, one of the top 10 companies in the country. His strategy is to increase the scale of the shipbuilding business at Dongjin Heavy Industries.
He has an overbearing personality but he is a gentleman in every way.
He received his college degree from an American university and gained work experience in management while he was there before he returned to Korea.
Upon returning to Korea he fell in love with Yoon Se-ra. Once he makes up his mind, he will use any methods to get what he wants.
That inevitably leads him on a collision course with Kim Hyun-min.

Jang Tae-hee / actress Choi Yeo-jin
The youngest daughter of the founder of Dongjin Heavy Industries. She is Tae-sung’s sister.
She is keenly interested in who will become the successor of her father’s company. That is why she divorced her husband, whom she married through an arranged marriage, after just six months of marriage because he lacked ambition. Though she is the daughter of the chairman, she wants to succeed her father as the next president of the company.
She takes on the role of being the head woman of the household and she follows her father to every meeting he attends. She has wide influence in the company. She starts to focus on the shipbuilding industry to counter her brother’s ambitions. She is drawn to Kim Hyun-min’s warm character.
She is profoundly moved when she sees Kim Hyun-min’s deep passion for ships and his ambitions to achieve more.

Hong Min-ye / Choo Sang-mi
A woman of mystery
Possessing stunning beauty, she has a curvy, sensuous figure, which gives her the look of a woman who is wealthy and powerful.
She oversees $500 million in cash as one of the hidden hands in the financial market. She has contacts with many influential people in politics, law, and finance. She runs an investment company and acquires debt-ridden and poorly managed companies, which she sells at a profit by hiring managers to improve the bottom line of these underperforming companies.