Since I don't have detailed information about the 'last period light novel', it's hard to say exactly. However, it might have a group of main characters. There could be a leader - type character who is trying to navigate through this 'last period'. There might also be a sidekick character who provides comic relief or some kind of support to the main character. And there could be an antagonist who is causing problems or trying to stop the main characters from achieving their goals during this 'last period'.
In the 'last period light novel', the main characters could be very diverse. There may be a character who is a scholar or researcher trying to find a solution to whatever crisis is associated with this 'last period'. There could also be a warrior - type character who uses physical strength to protect others. And perhaps a mysterious character who has some hidden knowledge about the 'last period' and is crucial to the story's development.
The main character is Yatora Yaguchi. He is the one who goes through a major life change when he discovers art.
Often, the main character in a light novel like 'the last embryo' is someone with a special ability or a unique destiny. There could be other characters who oppose the main character, creating conflict, and then there are those who form alliances with the main character. Without reading it in detail, it's hard to name specific characters though.
I don't have specific information about the main characters in 'the last summoner light novel' as I haven't read it. But typically, there would be the last summoner as a central character. There might also be a mentor figure, perhaps an old wizard or a retired summoner who guides the last summoner. And there could be friends or allies like a brave warrior or a clever thief.
The main characters include Claus Valca and Lavie Head. Claus is a young pilot with great skills and determination. Lavie, on the other hand, is his partner. They work together and support each other throughout their adventures. There are also other characters like Alvis Hamilton who also play significant roles in the overall plot.
The main characters in the 'Metro Last Light Novel' could include a young man who has grown up in the Metro and is now facing new challenges that threaten the fragile peace there. There may be a scientist - type character who is trying to find a way to make the Metro a more habitable place, perhaps by dealing with the radiation or finding new sources of energy. And there could be a group of comrades who join forces with the protagonist, each with their own skills and backstories, like a skilled fighter, a resourceful scavenger, and a wise medic.
Naruto and Hinata are surely main characters. Naruto, as the hero of the series, and Hinata, who has a special relationship with him.
The main character is a last - ranker who is on a journey to improve his standing. There are also other characters like his allies who support him in his battles and adventures, and his enemies who try to stop him from rising in the ranks.
One of the main characters is the titular Last Apostle. He has unique powers and a great burden on his shoulders.
Kazuma is a key character. He's a normal guy from our world who has to adapt to the crazy Konosuba world. Aqua is the goddess who brought Kazuma there but is often more of a hindrance. Megumin is known for her love of using explosion magic which has its own set of consequences. Darkness is the crusader who has some rather unusual, masochistic tendencies. These four characters are at the center of the story in 'konosuba last light novel'.
The main character is surely the last adventurer. There may be other characters that play important roles. For example, there could be a group of villagers who the adventurer helps at some point, and in return, they offer valuable information. There might also be other adventurers from the past whose stories are intertwined with the last adventurer's, like through a prophecy or an ancient pact. These past adventurers' spirits or memories could influence the main character's actions and decisions throughout the novel.