GRIM REAPER

GRIM REAPER is an criminal organization of Senran Kagura: The Black Swordsman series, it is an organization made up by two organization from Academy City's darkside, they are led by Kakine Teitoku and his comrades and are the main antagonist group of the series.

Background
The origins of the organization goes back several centuries ago, before the invasion of Osaka, The Reaper took Kakine Teitoku, Gokusai Kaibi, The Professor, Youbou Banka, Yoshio Baba, Xochitl, Yumiya Rakko & Saraku under his wings and train them under his tutelage, by doing so they become their apprentices, with the knowledge of the Shinobi World, they become the founding members of the Organization known as GRIM REAPER and from that point begin their quest of world conquer.

Prior to the events of Senran Kagura: The Black Swordsman series, The Reaper and his apprentices launch an all out attack on Osaka which made Akimoto Dragneel to rush there and save the citizens, with Akimoto distracted, they rush at the Dragneel's home and attack his Katsumi, however seeing how powerful she is, they make use of a technique that make her trap in the Realm of Darkness.

This event made them the Dragneel Family's arch-nemesis as Akimoto decide to go against them and thus this begin the endless war between the Dragneel Family and GRIM REAPER

They are also the enemy of the Shimada Family as The Reaper was a former members of Overwatch and was on a quest of killing all the remaining members including Hanzõ and Genji Shimada.

Warerobe
All members of GRIM REAPER wear a long black coats with the GRIM REAPER symbol on it, black gloves, pants and boots, in addition to that, the black coats give them protection when they use the dark corridors and also prevent their hearts from being corrupted by the darkness.

Members
All of the members of GRIM REAPER were train under the tutelage of The Reaper himself, each of them possess an incredible powers related to their respective elements and wield a weapon on their own and a nickname which correspond to their respective elements.
 * 1) Kakine Teitoku: Kakine Teitoku also known as "The Angelic Reaper", "Dark Matter" & "The one of touched god's territory" is the leader of GRIM REAPER and one of the eight apprentices of The Reaper who decide to carry on his plans after his defeat in the Second Shinobi Great War, he possess power over Dark Matter and Angelic powers which six wings appear on his back and can use as weapons.
 * 2) The Professor: one of the eight apprentices of The Reaper and GRIM REAPER's second in command, passionate of technology, he is also the brain of the organization when it comes to plans and countermeasure against his enemies and is also the one who takes decisions from Kakine, his ability give him the nickname of "Scientific Reaper"
 * 3) Gokusai Kaibi: one of the eight apprentices of The Reaper and one of the three lieutenants of GRIM REAPER, she possess an Esper power called Measure Heart which is an application of the telepathy power, apart from that, she is highly skilled with guns and others weapons, and has control over space and Ice powers, her nickname given by The Reaper is "The Reaper of Ices".
 * 4) Youbou Banka: one of the eight apprentices of The Reaper and one of the three captains of GRIM REAPER, also know as the Boy with goggles, he has mastery over Psychokinesis power, which he use to cut anything in his way whatever it is vehicles or wall, he also gain power over the darkness as he share with the other members a part of The Reaper's powers, he is know among the members of GRIM REAPER as "The Psychokinesis Reaper".
 * 5) Yoshio Baba: one of the eight apprentices of The Reaper and one of the three lieutenants of GRIM REAPER, while not very experimented in close combat, he is usually in his office helping his comrades from a distance by the use of robot and is a very skilled hacker, but he gain power over fire which come from his training with The Reaper, his power over fire are so high that he can burn an entire city and his civilians without breaking a sweat, The Reaper give him the nickname of "The Reaper of eternal flames".
 * 6) Xochitl: one of the eight apprentices of The Reaper and one of the captains of the organization, originally a magician from an magical organization named "Return to the Winged One", but she left the organization after The Reaper take her under his wing and train her hard to have a perfect mastery over her earth powers earning the nickname "The Reaper of Earth"
 * 7) Saraku: also know as "Kill point" due to his teleportation ability is one of the eight apprentices of The Reaper and one of the three captains of GRIM REAPER, he learn the wind powers from The Reaper and manage to perfectly master his newfound powers which earn him the nickname of "The Reaper of Wind"
 * 8) Yumiya Rakko: one of the eight apprentices of The Repae and one of the three lieutenants of GRIM REAPER, a powerful and skilled sniper that can kill his opponents in a second without leaving them the time to react, she has power over lightning due to her training with The Reaper, her sniper skill combined to her lightning powers make her one of the most powerful member of GRIM REAPER, her nickname given to her by The Reaper is "The Lightning Reaper"
 * 9) Misaki Shokuhou: one of the seven level 5 of Academy City and the first member who was not an apprentice of The Reaper. She joined GRIM REAPER for unknown reasons, her ability "Mental Out" made her able to control people to do the dirty work for her, she can control dozen, thousand of people, her ability make her earning the nickname of "The Queen"

Military force
in addition to the nine first members, GRIM REAPER also possess a large army of soldiers from their respective subordinate organizations including those from the yoma army which made up a total of 1 000 000 soldiers. that they use as the main force of the organization.