Detective Kazutoshi Gotou is a middle-aged clumsy workaholic detective. He is an action over words/thinking person. He knows Yakumo from a long time ago. He considers Yakumo like family and worries about him despite how he often gets angry at Yakumo for his contrary attitude. He asks for Yakumo's help whenever there is a paranormal involvement in the case he's investigating in. Despite Gotou's rough ways he is actually very kind, he sometimes gets too involved in a case and if it does not work out right he blames himself for it. When Yakumo was a just a kid Gotou saved him from being killed by his mother. Gotou was told my a man that a child was about to be killed (the man turned out to be Yakumo's real dad), he came to the site in time to stop Yakumo's mum from killing him. In volume 5 of the light novel, Gotou got kidnapped by Honda Yutaka because Honda thought that Gotou knew the truth behind the Nanase family murder. Gotou went missing for majority of the volume, he was saved by Ishii. In volume 6 of the light novel, Gotou took Nao in as his own daughter after Isshin passed away. Isshin had told him that he will leave Yakumo and Nao to Gotou if anything were to happen to him. Secret Files - Kizuna: Gotou first met Yakumo again in a park at night. Yakumo was sitting on a swing alone and Gotou thought he was the suspect he was chasing after. However, he did not remember or recognise who Yakumo was then but Yakumo knew who Gotou was. While working on a case, Gotou went to a vending machine to buy coffee and noticed a group of middle school kids physically attacking someone - Yakumo. Gotou saved Yakumo from being hurt any further, and because of it Yakumo's contact lens fell out revealing his red left eye, that was when Gotou finally recognised Yakumo as the child he saved years ago from being killed by his mother. From then on, they became acquainted again and Gotou would ask Yakumo for help in cases involving spiritual phenomena. Gotou is one of the few people who is not scared of Yakumo's red left eye and accepts him for who he is.
Funco's best friend, who nicknames her Fucco due to a spelling mistake. She has an energetic personality and a foul mouth with Osaka dialect, but is very kind. She is very delicate to the point of requiring frequent maintenance and is picky on what she eats representing her namesake's unreliability. She is an American M16A4 assault rifle (her name stands for "16") and has a large number of fans, as she is usually photographed for the cover of specialized gun magazines and this cohere with the real M16 which is very famous around the world (Second to AK-47 in terms of production number; see Comparison of the AK-47 and M16). In non-combat action, she tends to rapidly alternate between bursts of activity and sudden rests, relating to her namesake's three-round burst fire only capacity. Type: Assault rifle Place of origin: United States Cartridge: 5.56x45mm NATO Action: Gas-operated, rotating bolt (direct impingement) Rate of fire: Approx. 700-900 rounds/min Feed system: 30-round detachable STANAG magazine Muzzle velocity: 948 m/s Length: 999 mm Weight: 3.770 kg (Source: Ichiroku's title card as seen on IMFDB, Real M16's specs on Wikipedia)
Father of Manaka and Ayaka. Had high expectations of Manaka due to her genius-level of skill at magecraft. He wanted to use the Grail as a bridge to the Root, something his family had failed to attain for a thousand years and yearned for a thousand years more. He would be killed and sacrificed to the Grail by his daughter Manaka towards the end of the War. (Source: TYPE-MOON wikia)
A Wizard working alongside Ricardo Gavarni and Layla. He seems to specialize in mind control.
Ichijiku is the director at the research institute. His job is the supervision of "witches" and the management of "Sorcerian." He deploys people to capture and retake witches A-rank and above when they escape. He is cold and mercilessness demeanor meant that his regard for human life is meaningless. He treats every witches in a very cruel manner which for him they are merely his tools, he also has no hesitation of deposing any witch whom he sees unworthy to live. It was later on reveled that his interest to join the clandestine research institute was to find a way to revive his long dead sister Rena, where he conducts his own experiment behind his superiors back where he feeds some of his sister's brain into Kotori's grane hoping that his sister's memories would live inside Kotori but with no success, however it did accelerated the grane inside Kotori to hatch sooner than he expected.
One of Chino's school friends. Maya is very excitable and mischievous. She is also energetic and upbeat, but can be fairly blunt with her friends. She seems to look up to Rize.