I'm not entirely sure who the new characters are specifically without reading it recently. But usually, new characters in the Overlord series can be from different races like new types of demi - humans or some mysterious magic - using entities.
In the latest Overlord novel, a young human mage is introduced. He has a thirst for knowledge and ends up getting involved with Ainz's plans in an unexpected way. There's also a mysterious figure from a far - off land who has powers that are not fully understood yet and seems to be observing Ainz's actions closely.
Since I haven't read volume 14 in detail, I can't say for sure who the new characters are. But it's possible that there are new members of a guild or organization that Ainz has to deal with. These characters could bring new dynamics to the story, whether they are powerful warriors, cunning mages or something else entirely.
I don't have the specific information about new characters in Volume 15. But it's possible that there are new characters related to the religious or cultural aspects of the world in the light novel. Maybe there's a new high - ranking priest or a scholar who has knowledge about some long - lost secrets. These new characters would then interact with Ainz and his comrades, creating new storylines and conflicts.
In the latest Re Zero light novel, a new character is a diplomat from a neighboring kingdom. This character is very shrewd and is trying to manipulate the political situation to their own advantage. There's also a strange creature that is neither fully good nor bad. It has some unique abilities and is somehow connected to the secrets of the world. These new characters add more depth and complexity to the story.
I'm not entirely sure which new characters are introduced specifically in volume 9. But generally, in the Overlord series, characters like Ainz Ooal Gown remain extremely important. His actions and decisions drive most of the story. The floor guardians such as Albedo also continue to be significant as they carry out Ainz's orders and protect Nazarick. There may be some minor characters from the human kingdoms or other races that are introduced to show the different perspectives in the world.
Ainz Ooal Gown remains the most important character. His decisions and actions drive the plot forward. He is constantly strategizing about how to expand his influence in the new world.
One important character introduced could be some of the new leaders of the local factions in the New World. They play a role in the political and military aspects that Ainz and his forces interact with. For example, there might be a new king or a powerful general.
Ainz is still one of the main characters, of course. His actions and decisions drive a lot of the plot. There might also be some new characters related to the various factions that are introduced, but I can't recall their specific names right now. But generally, they play important roles in the power struggles and conflicts within the story.
I'm not entirely sure about brand - new characters specifically in Vol 8, but existing important characters like Ainz Ooal Gown continue to be central. His actions and decisions drive the plot forward.
One important character could be new adversaries that Ainz and his group face. These characters bring new challenges and often have unique abilities or motives. Another might be some minor characters within the native population of the new world that help to flesh out the world - building aspect.