Blue Planet

The Blue Planet (藍の星, Ai no Hoshi), also known as the Indigo Planet, is a fictional planet that appears in many works by Harumaki Gohan, most prominently in Futari No. Not much is known about it, however because of the fact that many of Harumaki Gohan's works seem to take place in the same universe, there is a possibility that more information about it will be revealed in the future.

There is a short story about the Blue Planet in the Futari No artbook titled "The World Where We Lived" (わたしたちが生きた世界 / Watashi tachi ga ikita sekai) which goes into detail about the history and current climate of the planet from the perspective of Nana. A translation of the short story, along with the rest of the art book, can be found here.

## Works that mention the Blue Planet

* Futari No
* Steel Wonder
* From Voyague
* Blue Ending Nova

## Overview

According to "The World Where we Lived", the Blue Planet is split into north and south. Additionally, there is a northern capital and a southern capital. It is implied that Himitsu takes place in the northern capital, which means there is a monarchy, of which Lili is a princess. The blue planet inhabitants were planning to build an underground tunnel to connect the two capitals, but they eventually decided to scrap the idea as the population decreased.

People who lived on the blue planet eventually started to board airships and migrate to different planets, and as such, the population has been decreasing more and more. Nana notes that she doesn't know if the people who boarded the airships ever made it to their next planet, because Origin would sometimes tear apart the airships as they ascended into the sky.

As mentioned in Blue Ending Nova, the Blue Planet would eventually reach the end of its life by Short-haired girl destroying it's core, possibly the planet galaxy's sun. Considering that when a blue star, the color of the Blue Planet's sun, turns red, a supernova happens, this is most likely what led to the planet's demise.

## Life forms

**Notice**

Due to the vague nature of Harumaki Gohan's stories, the following section contains speculation.
### Adults

Adults are a race of human that make up the majority of the population on the Blue Planet. Nana describes them as resembling tin dolls, however, to viewers in the real world they resemble robots. (The word "robot" seems to be reserved for things like Macaron on the Blue Planet.) Their appearance seems to vary based on where in the blue planet they live. The adults in the northern capital wear black cloaks and have bright blue bars of light for eyes, while adults in other regions have far more stereotypical robotic appearances.

### Origin

The origin is a species of large, serpent-like creatures living on the blue planet. Not much is known about them, but they are visible in the music videos for Saikai and Yakusoku. They are often seen flying through the sky. They have several string-like appendages that flow in the wind separately from the rest of their body when they fly. They are hostile toward airships, and are known to sometimes destroy them as they are in the air. The art book notes that they are also hostile toward whales.

### Whale

**Warning**

This section contains spoilers. Proceed with caution.
The whale is a rare, flying species that lives on the blue planet. They are very large, and they project bright emerald light as they fly. Not much is known about them, but they seem to be mysterious, almost mythical beings even to people on the blue planet.

Whales play a big part in the story of Futari No. Nana and Lili both have precious childhood memories of their first time seeing one, and they hang onto it as a symbol of their bond as they grow up. The picture book of the whale appears constantly in Himitsu, as if looming over Nana, and the cloud that Nana sits on as she watched Lili move away in Yakusoku is shaped like a whale. The whale can be read as representative of their friendship, their childhood, or perhaps both.

In the Futari No art book, it is revealed that after jumping off the airship towers in Saikai, Nana and Lili fall onto the back of a whale and are brought to the "next world" that they talk about in Tanjou, bringing about the conclusion to their story.

## Gallery

The whale in Yakusoku.The whale in Himitsu.A tiny picture book of the whale from Nana and Lili's childhood.The adults in Himitsu, wearing their black cloaks.An origin on the right side of the frame, flying on the same level as the airship.An origin flying through the sky in Yakusoku.Nana sitting with an Origin. This is the only existing image of an Origin up close.Nana, sitting at her desk, which has a whale model on it.