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.
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.
In this volume, the Lizardmen leaders such as Crusch Lulu are important. They represent the native species that Ainz has to deal with. Among Ainz's subordinates, Demiurge also stands out. He is very intelligent and his strategies and ideas are important for Ainz's plans. There are also other minor characters among the lizardmen tribes that add to the richness of the story.
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 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.
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.
Since I haven't read Konosuba volume 17, I can't say for sure. However, in previous volumes, new characters were often introduced to add more variety to the story. They could be allies or antagonists. In volume 17, new characters might be from a different part of the world in the Konosuba universe, like a powerful wizard from a far - off land or a sneaky thief from a seedy underworld.
Unfortunately, without having read Danmachi Volume 19 Light Novel in full, it's difficult to name the new characters precisely. But typically, new characters in the series are designed to bring fresh challenges and interactions. They could be powerful adventurers that Bell and his friends have to team up with or compete against, or they could be some strange creatures from the deeper parts of the dungeon with their own motives and behaviors.
I'm not entirely sure without re - reading it specifically, but there may be some minor characters introduced to add more flavor to the story, such as local villagers or new adventurers in the area.
Since I haven't read this particular volume, it's hard to say for sure. However, new characters might be introduced to represent different factions in the story's world. For example, they could be from a secret organization or a far - off land that has its own motives and goals, which will then interact with the main character and his group, either helping or hindering their progress.