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Zelo in full design
Character Titles
Super Android's Friend
Full Name Monochroid[Zelo] = _Type_iX02[Yabusame];
Species Monochroid
Music Themes
Online Media

Zelo (ゼロ, zero), officially Monochroid[Zelo] = _Type_iX02[Yabusame];, is a monochroid who, along with Rei, gives guidance and information about the Len'en Project on various videos. They are listed as a member of Trick Nostalgie.[1]

General Information[edit]

Zelo-chan was originally created for Rei to have a friend. Initially, they had no voice implemented, so they could only make cat sounds. Eventually, with a voice box, Zelo became a helper of Rei and second commentator in future videos.


Little is known of their personality since they are robotic. They are sometimes displaced with things that Rei says. According to their profile, they like cats, reading and sleeping.[1] They also like manga, genius people, travelling and belly rubs.[2]


Background Information[edit]


Their official name is Monochroid[Zelo] = _Type_iX02[Yabusame];, and their nickname is Zelo (ゼロ). "Zelo" is preferred over "Zero" in reference to Yabusame's surname: Houlen. "ゼロ" could mean the number 0, which may be related to Rei's name if read with the with the kanji "". The nickname is often appended with the Japanese honorific -chan (ちゃん).


Their appearance resembles Yabusame Houlen. They have light grey hair, dark eyes, and a grey tail. They wear a hat that resembles a cat, having two Senri eyes rather than the traditional singular eye that Tsubakura Enraku and Tsurubami Senri have. Underneath the hat are two cat-like ears. They wear a brown top which extends far down and away from them, making their belly visible. They wear grey shorts and what appears to be grey tights.


YouTube Videos[edit]

Zelo initially appears in this video, only shown as a simple silhouette by Rei. They were meant to be kept a secret.

Zelo's official reveal was in this video, although they did not speak in it, as they have yet to have their voice box implemented.

It is here where Zelo first speaks. In their first full appearance, Zelo commentates along with Rei information about the Len'en Project. In the next video, Zelo goes through the updates that have happened on the three past games Evanescent Existence, Earthen Miraculous Sword and Reactivate Majestical Imperial.

Zelo asked JynX to make them a game to test Rei's skills. They teach about how hitboxes work. Zelo shoots danmaku at Rei, having them trying to dodge them. They also have a theme called "Fantasy Automaton ~ Learning Chance!".



Zelo looks up to Rei and likes to observe them.[1]
Rei also claims to have created Zelo, but Rei's experience with making Lin seems to imply otherwise, or at least that Rei had assistance from someone else when creating Zelo.

Yabusame Houlen

Many aspects of Zelo's character alludes to Yabusame Houlen, from their name to their design. Zelo has, however, yet to show interest in Yabusame.

Official Profile[edit]

A transcript of Zelo's official profile from the "Profiles" section of the Trick Nostalgie website, along with the official translation. With the exception of their official name, slight adjustments to the translations are found within brackets.

メンバー No.02

Member No.02
Lethal Weapon

(Monochroid[Zelo] = _Type_iX02[Yabusame];)

Name: Zelo-chan
(Monochroid[Zelo] = _Type_iX02[Yabusame];)


Role within the circle: Technology & Information


  • ネコ
  • 読書
  • 昼寝
  • レイくんの観察


  1. Cat
  2. Reading
  3. Nap
  4. Observe Rei-kun (Observing Rei-kun)


  • 情報収取
  • 整備

Special talent:

  1. Collecting information
  2. Maintenance


Somewhat favorite food: Soba、Bonito


Other: I want to go to hot springs

In addition to the above profile, Rei also has another official profile from the video "FRIEND".


Additional Information[edit]

  • Along with Rei, Zelo transforms into a head figure for most of their video appearances. This is a direct reference to Touhou's meme "yukkuri shiteitte ne!!!".
  • Prior to making his own AviUtl script for lip-syncing Zelo on 17 November 2018[3], JynX had to manually program Zelo's mouth movement for their videos, taking up to 10 hours or more.[4]


Official Sources[edit]