WARNING: read at your own risks!

All items not inside spoilers should be revealed at chapter 10 or before, or are minute precisions on the characters' personnality or on the lore of the world. (Please tell me if I forgot to add spoilers around an information not present before though, in the chapter that contains that spoiler.)

The first main character.

He is a member of the original four-members-big D-ranked adventurer group.

He has entered the door of the dungeon, and has been 'blessed' by it as a result.

He likes his companions.

He recently obtained Anthesis' system, and was (still is) waiting to obtain another one (unknown as of now).

A D-ranked adventurer.

She is a member of the original 4-members-big D-ranked adventurer group.

She doesn't talk very often, but her combat power is pretty good (high rank D).

She has an unknown system.

A D-rank adventurer.

She is a member of the original 4-members-big D-ranked adventurer group.

She is quite impulsive and as such can be pretty blunt at times, and sometimes excludes herself from important meetings due to that bad trait of her, but that bluntness also makes her pretty likeable (though, she can restrain herself if the situation requires it).

She has an unknown system.

A D-rank adventurer.

He is a member of the original 4-members-big D-ranked adventurer group.

He is the most careful of the (now five) members of the party he is in, and is also the brain and is generally considered the leader of the group (though, that can vary depending on the situation, the group not being very big).

Until recently, he had Artemis' system, but he recently swapped it to Anthesis'.

She is the second main character.

After trying to go to the dungeon, she acquired the dungeon's 'blessing' through the intermediary of Finn.

She is the new member in the other four's adventurer party.

She was originally a farmer's daughter, but due to being uselessshe decided to flee the village (without any preparation). Eventually, she met the dungeon core and gained multiple skills, including combat knowledge.

She has an unknown system as of now.

The [goddess] of fire.

After being enslaved by the dungeon, she was asked to obey the group of five when time was stopped by the dungeon, or to ignore what was said and thought during those times otherwise (to keep up the front of being OK and not enslaved).

But usually, she acts like a distant superpower, like most (if not all) other [gods]. As such, she usually does not have any close followers (though she still has a lot of followers). She is one of the most known and powerful Gods of Earth.

She has ascended from the mortal realm, hence she is not a real Goddess (hence the square brackets). Although, she is recognized as a Super Entity by this universe's Governor.

The strongest dungeon known (and probably strongest dungeon period).

[It]s true rank is unknown. [It]s original type is/are unknown. [It]s age is/are unknown. It is thought that [it] has more than a single soul, which would be the reason for the plural in [it]s speech when refering to [it]self.

A hint that someone was created by [it] is that most spawn of [it] don't use any contraction when speaking (no apostrophe).

One of Anthesis' spawn.

He is a standard, if only stronger than usual (though at what level is yet unknown), wolfman who integrated in society.

He seems to be the envoy of the dungeon when [it] want to speak to the five adventurers.

Not much is known about this entity.

This entity is plural, and has no sense of identity, referring to itself as "we".

This entity is one of the, if not the, strongest entity when it comes to power of mind.
They have decided to pass on their knowledge to the group of five "because they wanted to".

They have a strong relation with Anthesis, even though for the time being it is unknown.

This system is a hidden display skill retainer system, meaning there is no way of knowing what skills have been acquired, but the acquired skills cannot be lost.

The skill growth is not hindered, but as a tradeoff anyone acquiring Artemis' system not though Anthesis' one allows Artemis to guide unconscious thoughts toward one goal if she so wishes. (There are no drastic thought pattern changes allowed, only small nudges.)

Located in the mortal realm, this is the only planet with confirmed life in a sphere around it of about 5 light years (source: Anthesis). That is not to say it is the only one in this universe, though.

This planet is the birth place of our five protagonists.

Its inhabitants are not very scientifically knowledgeable, but they still have quite a lot of knowledge about magic, with multiple systems.

This is also a planet attracting the attention of self-proclaimed 'superior beings' ('Gods'), that managed to be on the top of the social and political ladder. Below them are the nobles, and then there are the commoners.

The nobles have managed to practically enslave the commoners (they won't retaliate against a noble), while the 'Gods' have managed to put themselves above the nobles (no one will retaliate against them).

The 'Gods' gives systems to the inhabitants, and they secretely use those to influence the people.

The inhabitants of this Earth are weaker than the weakest human of Earth/0, as well as every force (gravity, structural integrity) to a potentially lesser degree.

The humans didn't conquer the world, but instead grouped themselves in small communities, about the size of an Earth/0 village, and the rest of the world is filled with monsters.

There seems to be only one entity originating from this planet, Planet.

Not much is known about the rest of the world, due to a strong mental field placed by Planet as training for the five adventurers.

The systems are somthing created by the 'Gods' and are given to the inhabitant of Earth.

These can come into various types, giving various benefits or negatives, but have an absolute balance (whether a system is balanced or not is determined by the Governor).

When a system has more positives than negatives, then the 'God' can add some way of controlling those possessing this system, which re-balances the system. But to avoid the 'Gods' to completely take over the inhabitants, the Governor also makes it so that the more someone is affected by a system, the more obvious the 'badness' or 'wrongness' of the system is (be it by a change in skin color of those who took it, knowledge directly given to the others, a sudden and new aversion to the one controlled, or any other means).

If it is the countrary, the 'God' can add a way for the mortal to add a way to control the 'God'. (Though, no 'God' actually used this.)

Note that in Anthesis' case, since [it] doesn't go through the Governor, there is no necessary balance, but it is required of him to copy parts of other systems he can connect to (through various means) to make them his own.

The RB counters (or Requests Battlefield counters, or Requests request counters) are the counters where adventurers ask to take on a given request, and where the new requests are originating from.

The RCF counters (or Requests Completion/Failure counters) are the places where adventurers report successes in their missions.