Red continent

The Red Continent is the only other known continent in Grimgar (the world), it's situated far to the East of Grimgar (the continent), across the Blue Sea.

Because of how far it's from Grimgar it seems like most people only have a very shallow knowledge of the Red Continent and the races which inhabit it.

Geography
The Red Continent is a great landmass East of the Coral Archipelago which itself is already to the East of Grimgar, across the Blue Ocean. Aside from that, almost everything about its geography has been left unexplained.

Similarly, we don't know if the Red Continent is called that way because parts of it are red or for another reason.

Inhabitants
It seems like unlike in Grimgar, where most of the civilized races look relatively similar (some even being able to inter-breed), the races of the Red Continent can vary wildly. Some, like the three-eyed people, look exactly like human aside from a third eye in the middle of their forehead, while some aren't even humanoids, like the thorny-skin people who Yume describe as "walking sea urchins".

Because of the great distance between the 2 continents and the huge risk involved with traveling almost none of those people can be seen in Grimgar. However, they can be met in the Coral Archipelago which had already been colonized by the many-eyed people when the first explorer from Grimgar discovered the islands.

The Continent is home to a multitude of races, which are named after the most noticeable part of their appearance:

The long-armed people
Their appearance as a whole is unknown the only thing which was described is that their arms are so long they almost reach the ground.

Since that description would be fairly useless otherwise, it's likely that the long-armed people are humanoid, at least to some extent.

The tall-eared people
The tall-eared people have, as their name implies, have long rabbit-like ears, but face reminiscent of a vicious dog (the "vicious" part could only apply to the pirate captain from whom that description comes, but as he is the only one of that race who was described it's impossible to know).

The three-eyed people
Three-eyed people look exactly like humans except for the third eye on their forehead after which they're named. However, whether that resemblance is just a coincidence or 2 species are related, is unknown.

The fives Three-eyed people described by Yume all had red hair, however, it's unknown if that was just a coincidence or if that's one of their race characteristics. Similarly, all five had bronze-colored skin, which could be because they're pirates living in a tropical climate or something all Three-eyed people have in common.

The many-eyed people
They were the first to colonize the Coral Archipelago, they seem to be humanoid but it's unknown if they look human, they're named after the numerous bug-like eyes covering half of their face. They are able to speak human languages.

The thorny-skinned people
The thorny-skinned people are described as "walking sea urchin".

Other

 * The tailed people
 * The iron-headed people
 * The furry people
 * The feather-boned people
 * The shadowless people
 * The ball people

History
Like most things about the Red Continent, almost nothing has been said about its history, we do know that the civilizations there are rather old and likely started to explore the world before Grimgar's inhabitants as the multi-eyed people had already colonized the Coral Archipelago when, 200 years ago, the first explorer from the kingdom of Arabakia discovered it.

After people from the 2 continents came into contact, kingdoms from both started to do some commerce using the Coral Archipelago as a relay point on the long and perilous travel. While for a time commerce flourished, the Kingdom of Arabakia and Ishmal being in relation with multiple Kingdoms on the Red Continent, however that came to an end with the fall of most human kingdoms and Arabakia retreating behind the Tenryu.

Nowadays, it seems like commerce continues, at least with Vele and the Emerald Archipelago. The races from the Alliance of Kings are most likely also in contact and trading with the Red Continent as Igor, a port city once considered to be Ishmal's door to the sea is now ruled by an undead, Archduke Deres Pain, and inhabited mostly by Undeads, Orcs and other races from the Alliance.

Politic
Very little has been said about the political situation of the Red Continent. What we do know for sure is that most of its surface is cover by a multitude of kingdoms rule by as many kings from many races. Moreover, from the fact that inhabitants from the Red Continent were able to colonize the Coral Archipelago before anyone from Grimgar had even discovered it, it's reasonable to think that civilizations there are as, if not more developed than most civilizations in Grimgar.

Trivia

 * Kisaragi, President of the K&K Pirate Company, has apparently left Grimgar on a journey to the Red Continent.
 * On the Red Continent people without facial hair are seen as children, forcing Kisaragi to wear a fake mustache, leading to Momohina also wearing a fake mustache to imitate him.