Anko Uguisu

Anko Uguisu (アンコ) is a side character in Call of the Night. She is a private detective who specializes in cases involving vampires, and has made it her mission to kill all vampires.

Ten years ago, she went by her real name, Kyouko Mejiro (キョウコ), and was a member of a literature club at the school Nico Hirata taught the night class of. She became Nazuna Nanakusa's first friend until her father was turned into a vampire, causing both parents to die and Kyouko to quit school and disappear.

Appearance
Anko has brown hair which she partially ties to a bun or ponytail and brown, lusterless eyes. She wears round glasses that belonged to her father.

Her primary outfit consists of a beige raincoat, under which she wears a dark t-shirt and a black skirt and boots with heels. She wears gloves that cover half of one hand each. Later she wears her coat less frequently and cuts her hair short.

When she was a teenager, she wore a school-uniform that consisted of a dark sailor-uniform and skirt. Her regular outfit was the same as the one she's wearing in the present.

Personality
Anko is a very straightforward, observant and extroverted woman with a, mostly, casual attitude who likes to mess around with others.

However, she can drop her casual attitude in the blink of an eye and quickly unsettle someone.

One of her most defining traits is her hatred for vampires. She is ruthless and determined to wipe them all out and exhibits sociopathic behavior. She usually shows no empathy when hurting them and is even shown to be highly sadistic and psychotic as she maniacally laughed while repeatedly stabbing Akkun in the gut.

Nazuna Nanakusa
When Anko attended to school in night time, Nazuna entered the literature club room and Anko would welcome her in. One of her first interactions with Nazuna was almost kissing her while she was sleeping. Despite spending most of her time alone, Anko was very friendly and welcoming towards Nazuna and they quickly became friends, with Anko even displaying sexual attraction towards Nazuna.

Anko would recommend books to her and was often baffled by Nazuna's personality and lack of common knowledge, playing an important role in shaping Nazuna into the person she became later. Soon, she would entrust very personal information to her, like her father having an affair and they would investigate it together. Nazuna revealed to her that she was a vampire not long after. Anko would break down in tears because of her pent up frustrations regarding her family and begged Nazuna for help. Nazuna tried to make her her first servant, but couldn't because Anko wasn't in love with her. They wanted to meet again, but after Anko's family was destroyed she became resentful of Nazuna and left her after a short exchange.

Kou Yamori
Anko and Kou first met when he was scouting for potential costumers for Nazuna's snooze shop and approached her. They went to a café, where Anko learned of Kou's illegal job and explained that she wouldn't report it since he probably had his own circumstances. After talking some more, Anko quickly noticed that Kou knew something about Akkun's case, but left the place after initially scaring him. They would meet again and Anko knew that Kou was dreaming of becoming a vampire, berating him for it since she believed that all vampires do is cause suffering. She explained that she doesn't want to hurt him, but would be forced to in case he remained loyal to Nazuna, saying that she will protect him and offered him to "use her however he wishes". She would often tease him and is genuinely interested in a relationship with him.

Abilities

 * Detective skills: As a detective, she is very skilled in finding information about specific people and even stalking them. Whether through deduction or investigation, she described Kou's life and personality with frightening accuracy, including small, trivial details.
 * Knowledge of vampires: Having spent 10 years hunting vampires, she has gained a decent amount of knowledge about them. Because of her father's death, she knows of their weakness, which is being reminded of their human lives. Even without killing them, she knows of a few ways to survive an encounter with them.
 * Knowledge of weapons: She knows how to handle a knife and attacked Akkun and Hatsuka with one (Although it was useless against the latter since he could make his body phase through it). She also knows how to wield a gun, owning a revolver.
 * Foul tasting blood: Since she got her blood sucked by a vampire 10 years before the story started and didn't turn into one, it's now impossible for her to become a servant which makes her blood repulsive for any vampire who tries to suck it. She is aware of this and uses it to her advantage.

Trivia

 * Anko is currently the only known human who knows how to kill a vampire.
 * Her raincoat and smoking habit are likely inspired by the famous detective character Columbo.
 * According to her, her feet are swollen because of her job.
 * Because of her smoking habit, she has very short stamina, quickly running out of breath.
 * After Kou and Nazuna, Anko is the character who appears on most volume covers, being the main focus on 3 and featured on 2 more.