A member of Arc Aile who, like Cisqua, chose to use weapons rather than Edel Raid, Maina is an old friend of Cisqua. She appears in an episode of the anime to bring Ren back to HQ as the main Arc Aile trio uses the disguise of a vacation to help find Edel Garden. It turns out she was controlling a Sting Raid that was attacking people on the ship through song, but in the end Cisqua uses the song against her and has to kill her to prove her dedication to Ren. Cisqua also claims that Maina is the better sniper, but worse at everything else.
Maina is the mother of Moena and part of Angel Blade.
Sakuya is the only human living in the Scarlet Devil Mansion, yet she is also the head maid. The official fanbook suggests she had been a vampire hunter before she began working in the mansion, but she was defeated by Remilia Scarlet who pitied her and gave Sakuya her current name. Though she looks about sixteen like the other girls, Sakuya has the ability to slow, stop and possibly reverse time. She seems to have been serving Remilia for a long time and may be far older then she looks. Socially, she interacts mainly with the others in the Scarlet Devil Mansion. Her talents are cooking, knife throwing and time manipulation. The latter two abilities characterize her appearances in-game, and led to frequent parodies in reference to Dio Brando of JoJo's Bizarre Adventure, who also controls time and throws knives. This reference goes so far as Sakuya using some of his poses in a game. She is often associated with dogs by other characters because she is serving as a demon's "faithful guard dog" even though she is a full blood human. Due to the inconsistent artwork depicting her bust between games, d�jinshi often make fun of her by indicating that she pads her breasts. (Source: Wikipedia)
Karura was the wife of the Fourth Kazekage, and the mother of Gaara, Kankur�, and Temari. Against her wishes, her husband had the spirit of Shukaku sealed within Gaara before he was born. During his birth, her life was used to power the sealing process. Before she died, she cursed Sunagakure, hoping her son would avenge her death and the horror she had been put through.
Nawaki (縄樹) was the younger brother of Tsunade and the grandson of the First Hokage. He was very much like Naruto Uzumaki in both appearance and personality and like Naruto, Nawaki also had the dream of becoming Hokage one day. He shared this dream with his sister on his twelfth birthday, who gave him their grandfather's necklace in the hopes that it would help him achieve is dream. The day after his birthday, Nawaki died in battle. His body was so heavily mutilated that it was beyond recognition. Orochimaru would later offer Tsunade to bring Nawaki back to life, together with Tsunade's lover Dan, in exchange for healing his arms. The resurrection would require a human sacrifice, though. She ultimately refuses, realizing that Nawaki and Dan would not want her to sacrifice the lives of others in exchange for theirs. (Source: Narutopedia)
Kaiza (カイザ) was a traveling fisherman, who came to the Land of Waves to seek opportunities. When he saved Inari from drowning, he took up the young boy to teach him about life and protect the things that were precious to him. He married Tsunami (Inari's mother) and acted as the role model for Inari. When Gat� tried to take over the Land of Waves, Kaiza tried to stop his business. Gat� used him as an example to people who had hoped to stand against him, by having his goons cut off his arms and killing him. (Source: Narutopedia)