The past is just the past. There’s no inherent value in getting over it or catching up to it.

–Ryūichi Riko.

Ryūichi Riko
Ryūichi Riko
"Your Heart is a Swirling cauldron of Blackness that does not pump blood, But rather a sludgey mixture of Evil and Broken Dreams."
Kanji 龍一りこ
Romaji Riko Ryuiichi
Alias Riko (りこ, Riko)
Race Human
Age 16
Birthday November 10
Horoscope Scorpio
Height 175 cm
Gender Female
Eyes Red (Right)
Yellow (Left)
Hair Black
Blood Type AB
Nationality Japanese
Ashinaka High School
Class Class Insignia 3-A Class
Professional Status
Occupation Student
Base of Operations Dormitory
Personal Status
Status Alive
Weapons Switchblade
Seiyuu Nozomi Nakashima


She appears to be elegant in some way and also has very good manners. She is a girl with black hair in long twintails. Her right eye is red in color while her left eye is yellow.She wears black winter uniform when she goes to school. She also wears a pair of black pantyhose.


Riko can be described a person whose personality is hard to read, she is also appears friendly,  but since she's actually very selfish and two-faced,  possessing a well-polished dislike of humanity that borders on mistrust. She is a skilled actress, capable of putting on the façade of an innocent, curious young girl when she needs to, shown when she registered as a student at the Ashinaka High School, even speaking in a very polite manner. However, under that mask lies a psychotic woman, prone to fits of insane laughter that possesses no regard for human life; however, there is some sort of twisted justice behind her methods. She is also a narcissist who takes a lot of pride in her looks. Her number one priority is to protect her beauty.

Digging further, however, shows that Riko possesses some degree of innocence that her psychotic behavior has not entirely ruined; she has a soft spot for small animals and other creatures.



She perhaps more fearsome ability along with her great intelligence is her mastery skill in basically all type of weaponry. She also is fairly acknowledgable of poison and drugs although she uses them few times.


Switchblade: She always carry this around, which she hides under her sleeves and pockets.


  • She like's reading manga as her pastime.
  • She hate those peoples who can't take care of themselves.
  • Ryuzaburo's younger sister.
  • Riko lives alone with his father and brother, who is extremely wealthy and raised her with 'excellency in all areas' mentality to be called deserving in their household.
  • Riko likes to wear black colored clothes. She wears black winter uniform when she goes to school and wears black gothic dress when she goes out.
  • She is shown to like cute little animals. She also seems to be fond of milk tea.
  • When she was a child, she's very troublesome girl who destroyed everything to become the "Number 01".