Nao Ryuzaki
Biographical information
Full name Nao Ryuzaki
Gender Female
Status Alive
Birth 1992
Personal information
Nationality JapanUnited States Japan-American
Past profession(s) Technician
Notable relationships
Affiliation(s) Nyctochral Police Department
Mysterious (formerly)
Nyctochral Police Department
Rank Tech Expert
Game information
Appears in Criminal Case
First appearance Case #1: All Nightmare Long (s1)
Who's the newbie? Invade my personal space and Bessie will be happy to taste new blood.
—Nao Ryuzaki

Nao Ryuzaki (Jpn: 竜先なお) is a main character appearing in Season 1 of Criminal Case, where she serves as the Nyctochral Police Department's Tech Expert.


Hailing from Tokyo, Japan, Nao is a 24-year-old technical expert of the Nyctochral Police Department who worked as a technician-turned-hacker for the notorious hacking group, "Mysterious" prior to her tenure in the department. She has black hair in a long ponytail and brown eyes. She normally sports a yellow layer under a black robe and a pink kimono over the robe. Additionally, her outfit has a katana (which she refers to as "Bessie"), a Thai mongkol around her forehead, and a golden necklace of a bird.

Nao's favorite animal is a water lion and food is chicken noodles with herbal tea. She is known to be an enigmatic person who tends to be cautious and is a frequent risk-taker.



Calm down, partner. This section is soon to be added.

Notable Events of Criminal Case

Calm down, partner. This section is soon to be added.

Personal Life

Calm down, partner. This section is soon to be added.


As the Tech Expert of the Nyctochral PD, Nao has the responsibility of taking care of all the necessary digital/technical analyses, and to inform the team of such results after a certain amount of time.

Below is the list of analyses Nao performs throughout the course of the game:

Case #1: All Nightmare Long

  • Golden Mixtape (09:00:00)
  • Creepy Whistle (06:00:00)

Case #2: A False Dawn

  • Tablet (06:00:00)


The player may choose Nao to join the investigation of each crime scene (in any Nyctochral case she teamed up with the player) and provide hint bonuses. She is available as a 4-hint, level-10 partner.


  • Mysterious, an organization Nao was previously affiliated with, is an obvious parody of Anonymous, a loosely associated international network of activist and hacktivist entities.

Case Appearances



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