Kiku Hoshimi

Kiku Hoshimi (キク) is a side character in Call of the Night. She is vampire who wants to drink Mahiru Seki's blood. Kiku is the oldest known vampire in the series, being over 400 years old. According to a theory, if a vampire sucks the blood of a human they are in love with, the human will die. Kiku has been testing this theory for what seems like centuries, always disappointed by the result, in which her partners end up alive and become vampires, causing her to leave them.

Appearance
Kiku is a young looking woman with a pretty appearance, featuring shoulder-length light brown hair and eyes, a narrow face, preferring to wear coats, tops and skirts, stockings and high-heels.

Personality
Kiku has an almost unpredictable personality, to the outside she seems nice and empathetic, and thereby also quickly becomes friends with Mahiru Seki, who meets her often due to his part-time job as a flower courier. She is the vampire with the most underlings, according to Hatsuka Suzushiro she has over 50 of them, although she often mentions that she doesn't really want to have underlings and accidentally transforms them. She usually abandons them after they turn into a vampire.

She is extremely secretive and enigmatic, watching people from afar and almost always being ahead of others in situational awareness. Azami says that if someone tails her for too long, she will know. If she gets confronted, she tries to not drag it out longer than necessary and either flees or uses her environment to her advantage.

Kiku is an extremely twisted individual who enjoys toying with people and boasts arrogance as she sees herself as superior compared to vampires like Nazuna, mockingly calling her out for risking the exposure of vampires to humans despite doing the same. She is happy to use intimidation to scare off people who try to get in her way and has a terrifying presence.

Maybe as a result of her unsuccessful search for love, she is mentally unstable. When she confronted Anko Uguisu, she seemed to have a breakdown, laughing maniacally and simultaneously boasting and despairing over nobody, not even herself, knowing "what is fucking wrong with her".

Mahiru Seki
They met when Mahiru delivered flowers to her place and she started to chat with him. Some time after, they started going out together and got along well. Kiku complimented him and listened to Mahiru whenever he wanted to say something, always telling him what he wanted to hear. After being pressured by circumstances, she revealed to Mahiru that she is a vampire and said that she had no intention of turning Mahiru into a servant. After Mahiru chose to stay with her regardless, she had a crazed expression on her face, thinking that Mahiru might be the one whom she will fall in love with. After that, they spent more time off-screen and Kiku caused a drastic change in Mahiru's personality, manipulating him to abandon his friends and family, leaving her as the only person he has left. She hasn't sucked his blood yet.

Azami
Kiku and Azami have known each other since Azami worked under a Yakuza boss who was in a relationship with Kiku. She stood up for him, scolding the boss for making jokes at Azami's expense. Because of Azami's shy and reserved nature at the time, Kiku didn't think that he had any interest in girls until an assassin killed everyone and Azami sacrificed himself to save her, for which Kiku saved his life in return, turning him into her underling. Even though they didn't see each other for the next 35 years, she remembered him and was aware of his work behind the scenes he did for her and expressed gratitude for it.

Quotes

 * (To Mahiru) "A middle-schooler, huh~ I couldn't tell since you looked so mature." -Chapter 50
 * (To Kou) "Hey, Yamori-kun. 'Those who disturb someone's romance'...Do you know what happens to them? In this case...they get eaten by a demon...I suppose." -Chapter 49