Leti Lowran is a TSAB Admiral, who appears briefly in A's and as a regular background character alongside Lindy Harlaown in A's manga. She is a recurring character in StrikerS manga but in StrikerS itself, she makes only a cameo appearance and is the mother of Griffith Lowran. (Source: Nanoha Wiki)
Alicia is Precia's biological daughter. They lived a happy life until Alicia died at the age of eight, driving her mother insane. Precia preserved Alicia's body in a glass tank and dedicated her life to obtaining the Jewel Seeds, which could lead her to Al Hazard, the legendary place that could restore her daughter. Using Alicia's DNA, Precia created a clone called Fate to gather the jewels for her. Fate, implanted with Alicia's memories, was abused to no end by her "mother," but remained painfully loyal until the truth was discovered. In the end, Alicia's body fell into the void with Precia. In the second season, the Book of Darkness draws Fate into a dream of what she has always wanted: a happy family life. Precia is sane, Alicia is Fate's older sister, and everything appears good. Alicia wishes that Fate could stay in the dream with her forever, but Fate sadly refuses, saying that her friends need her more right now. After Fate refuses, Alicia tells Fate that she wishes they were both together in reality and tells Fate to go back to her strong and gentle friends. (Source: Wikipedia) In MSLN Movie 1st it was confirmed that she was left-handed in contrast to Fate.
Communications operator in Long Arch and MS6's mechanic (specializing in devices). She designed Subaru and Teana's intelligent devices (with help from Raising Heart). Because of her device specialty, she's sometimes called a Device Meister. She oversees the training undergone by the forwards, using the data gathered to make adjustments to their devices. Her nickname is Shari. She is allegedly named for the Mitsubishi Chariot. (Source: Wikipedia)
Subaru's father and a one time teacher of Hayate's, though Hayate has since passed Genya in rank. The Major is commander of the Ground Forces Unit 108, a ground-based unit for criminal investigation. He adopted Subaru and Ginga after his wife found them on a mission, and later adopted Cinque, Nove, Dieci and Wendi. (Source: Wikipedia)
Triangle Heart: Kyouya is the son of Takamachi Shirou, and is the heir to his father's Mikami twin kodachi style. He lives He has vowed to avenge his father who was killed when he was young. He is extremely close with Miyuki, who grew up with him, and he considers her his blood sister even though they're cousins. Although Kyouya is the better swordsman, the team make an excellent team in a fight. He is hired with Miyuki to defend his childhood friend, Fiasse, from a threat to kidnap her. Ellis McGaren, Fiasse's official hired bodyguard and also Kyouya's childhood friend, is initially unhappy with both of them working together to protect Fiasse, and thinks Kyouya will just get in her way. Eventually the two learn to get along and work together. Mahou Shoujo Lyrical Nanoha: Kyouya is the real brother of Miyuki and Nanoha here, and lives with his mother, Momoko, and his father, Shirou. Him and Miyuki both play a very minor role in the Nanoha series, but they are both still excellent swordsmen. Kyouya is Miyuki's teacher in the series. In one episode, Ky�ya takes Nanoha to the Tsukimura mansion and spends the day with Shinobu, the two a very discreet couple. He remains unaware of Nanoha's magic powers throughout the series, until the end of A's when Nanoha reveals it to him and the rest of her family. (Source: Wikipedia)
Quattro comes after Uno, Due, Tre and Cinque regarding the length of her period on active status. In spite of the fact that she was originally created as an intelligence processing-type to support Uno, Quattro was eventually upgraded with illusionary and ECM capacities at some point during her ten years of service to boost her potential as a rear commander. She possesses great evasion skills thanks to being flight-capable and her Inherent Equipment, Silver Cape, provide her with stealth and anti-magic defensive measures. Intelligent and highly capable of independent thinking, she uses whatever means she believes necessary to achieve her goals. Still, she has a somewhat playful attitude towards her job that makes her personality similar to Scaglietti's. She always puts an act when near her sisters, always controlling her own words and actions, as she apparently has a side that she doesn't wish them to see. Quattro differs a lot from her sisters when it comes to her own personal opinions, especially those regarding Lutecia. Overall, Quattro is extremely similar to Scaglietti, especially when she stops hiding her true personality near the end of StrikerS. In episode 25, she was knocked out by a massively overcharged Divine Buster from Nanoha that blew through much of the Cradle in order to reach her, using a Wide Area Search for targeting. Quattro expresses disbelief that Nanoha would decide it was easiest to just blast through the walls, but immediately follows this with a flashback indicating that she was involved in the airport fire that happened four years prior (as she remembers Nanoha's Divine Buster from that incident). -Wikipedia-
The second member of the Numbers was designed while having in mind the need to produce a unit capable of performing long-term infiltration missions in an independent fashion. Her 'IS' allows her to reshape her body's appearance and is especially calibrated to deceive the usual inspections made over one's self in most of the TSAB-administrated worlds. While in missions, her status quo is a classified information even among the other Numbers and the only ones who knows about it are Jail and Uno. Scaglietti's influence over Due is the strongest among the Numbers. She was Quattro's mentor, who inherited many traits of Due's psyche and personal ambitions as a result of the time that they spent together. After the completion of her long-term missions in stealing the Shroud of the Saint King and assassinating the TSAB High Council, she looked forward to be reunited with Scaglietti and her sisters, especially those designated with numbers 6 to 12, who she had never met before. In episode 24, she is killed by Zest after killing Regius. In the SSX Sound Stage, she is referred to by Jail, who asks the TSAB to give her a decent burial in return for his services towards the Bureau in the sound stage. (Source: Wikipedia)