Kashiwagi Yuki (20)

•  A samurai from the infamous Kashiwagi Clan
• Has a good 12 year friendship with Miyuki 
• She found Mayu after a fight with a street gang
• Known more as the Dark Samurai or Black         
• Is Blackhearted on the outside yet a big softie on the inside
• Wants to avenge her parents death
• Always wears a ninja's uniform (See a/n on chapter 1)

Watanabe Mayu (18)

•   An infamous street thief
• Collects information on other people as she meets them
• Meets Yuki after the latter fought a street gang       
• Betrays Yuki,  Miyuki and Yuko for money
• Almost kills herself with grief    
• Knows nothing of her sister (Miyuki)
• Always wears a hoodie ,(Even when it's hot (hehehe)

Watanabe Miyuki (20)

• Is a fisher woman because of her parents death and needs to pay off a huge amout of debt
• Has a good 12 year  friendship with Yuki
• 3-4 years before the story begins Yuki gives her a prized katana and a million yen (1/100 of Yuki's family earnings)
• Assassinates famous people for money
• Knows she has a sister so she is looking for her
• Almost gets killed by an assassin but if it wasn't for the katana Yuki gave her she wouldn't be alive

   Oshima Yuko (23)

•  Is Yuki's intell
•  Feels she's responsible for the death of Yuki's parents
• A samurai from the second most infamous clan, the Oshimas yet her family are the 3rd richest behind the Kashiwagis and the Takahashis
•  Feels suspicious of the both Watanabes as they both do wrong deeds
•  Gets lethally injured after an explosion by Kojima Haruna yet she loves the latter