Rei Hiroe

Roberta, the terrorist-turned-maid that made her appearence in the first season of Black Lagoon, returns in this five-episode OVA series-and this time, all bets are off! Roberta's benefactor, the patriarch of the Lovelace clan, is murdered during a political rally. The assassin's trail soon leads back to Roanapur-so now she has returned on a mission of vengeance! However, close behind her is the new patriarch, Garcia, as well as Roberta's apprentice (and maid), Fabiola Iglesias. (myanimelist.net)

A Japanese businessman, captured by modern-day pirates, is written off and left for dead by his company. Tired of the corporate life, he opts to stick with the mercenaries that kidnapped him, becoming part of their gang. (imdb)