Synopsis
Within Thailand is Roanapur, a depraved, crime-ridden city where not even the authorities or churches are untouched by the claws of corruption. A haven for convicts and degenerates alike, the city is notorious for being the center of illegal activities and operations, often fueled by local crime syndicates.
Enter Rokurou Okajima, an average Japanese businessman who has been living a dull and monotonous life, when he finally gets his chance for a change of pace with a delivery trip to Southeast Asia. His business trip swiftly goes downhill as Rokurou is captured by a mercenary group operating in Roanapur, called Black Lagoon. The group plans to use him as a bargaining chip in negotiations which ultimately failed. Now abandoned and betrayed by his former employer, Rokurou decides to join Black Lagoon. In order to survive, he must quickly adapt to his new environment and prepare himself for the bloodshed and tribulation to come.
A non-stop, high-octane thriller, Black Lagoon delves into the depths of human morality and virtue. Witness Rokurou struggling to keep his values and philosophies intact as he slowly transforms from businessman to ruthless mercenary.
How old are the Main characters of the Black Lagoon.
Revy

Age: Mid to late 20s
Height: 165.1cm/5’5”
Revy (レヴィ), sometimes referred by her full name Rebecca (レヴェッカ), is the female protagonist of the series. She does most of the fighting for the Lagoon Company. Very little is revealed about her past, although portions can be pieced together through the series. Revy is a Chinese-American born and raised in Chinatown, Manhattan, near Mott Street, spending most of her youth as a thief and murderer. Flashbacks throughout the series reveal that Revy may have honed her skills with firearms by shooting at cans, and that her first murder may have involved shooting an unknown man while using a pillow. It is unknown whether the pillow was used to suppress the noise or to help avoid looking at her first victim.
Okajima, Rokurou

Age: 25-26 years old
Height: 173cm/5’8″
Rokurou Okajima, also known as “Rock,” is the protagonist of the series. He was a Japanese salaryman for Asahi Industries in Tokyo until he was taken hostage by the crew of the Black Lagoon. He joined the Lagoon Company after his department chief, Kageyama, abandoned him in an attempt to cover up the smuggling operation in which Rock had been an unwitting participant. Rock is a humble and mild-mannered person despite being on the business end of guns from friend and foe alike, and often seems surprised at the barbarity of the Southeast Asian crime world. He still wears his tie, short-sleeved dress shirt, and dress pants because although now a pirate, he still retains his business persona. He prefers to use words over weapons when interacting with others. Rock, after joining the Lagoon company, has wondered if he is experiencing Stockholm syndrome.
Dutch

Age:
Height: 194cm/6’4″.
The leader of Lagoon Company and captain of the ex-American Navy PT boat Black Lagoon. He is a former American soldier who fought in the Vietnam War. He tends to stay away from the fighting associated with Lagoon Company’s activities. Instead, he gives orders and negotiates contracts with clients – usually Balalaika of Hotel Moscow. Dutch is a calm, easygoing character, and quite friendly. He is a Christian, denomination unknown. His body is heavily muscled, and he is always seen wearing a pair of sunglasses. He appears to be in his 30s, but is likely in his 50s, based on his military service in Vietnam.
Benny

Age: Unknown.
Height: 180cm/5’11”
Benny is a college dropout from a Florida university where he studied until getting into trouble with the FBI and the mafia. He works as the Lagoon Company’s mechanic, computer specialist, and researcher. He is of Jewish descent as he puts it himself and is often called “Benny-Boy” by Dutch.
Roberta

Age: late 20’s
Height: 169.8cm
Roberta is a maid who worked for four years at the Lovelace household in Colombia. Although her domestic skills, such as cleaning and cooking, were poor, she has developed a close friendship with the young scion of the Lovelace family, Garcia. Roberta was once known as Rosarita Cisneros, a former FARC guerrilla trained as an assassin in Cuba and an internationally wanted criminal. She earned the moniker “Bloodhound of Florencia” for her relentless drive to achieve her objectives.
Source: Myanimelist.