The 14 Doctors are the core. The First Doctor, with his grandfatherly yet firm demeanor. The Second Doctor, full of his own brand of wily charm. And so on through all the regenerations. Companions like Martha Jones, who was intelligent and勇敢 in her own right, could also be significant. She might offer insights or help in a crucial situation. Then there are the recurring villains. The Master, with his devious schemes, could be a major player, trying to take advantage of the chaos when all the Doctors are together, forcing the Doctors to not only deal with the external threat but also their old nemesis.
Obviously, all 14 Doctors are the main characters. Each with their own distinct personalities, from the wise and somewhat eccentric First Doctor to the energetic and compassionate Thirteenth Doctor. Their companions could also play important roles. For example, Rose Tyler might accompany the Ninth or Tenth Doctor, and Clara Oswald could be with the Eleventh or Twelfth Doctor. And of course, the Doctors' archenemies like the Daleks or the Cybermen could make appearances as antagonists, which would further drive the story as the Doctors work together to defeat them.
The main characters are, without a doubt, the 14 Doctors. They are the heart of the story. Each Doctor has his or her own quirks and qualities. The Fourth Doctor with his long scarf and love for jelly babies. The Fifth Doctor with his cricket - loving nature. Alongside them, some of the more memorable companions like Donna Noble, who had a special bond with the Tenth Doctor, could be involved. And let's not forget the Weeping Angels. They could be lurking in the shadows, adding an element of horror and mystery. The Doctors would have to use their combined wits to protect their companions and themselves from these terrifying foes while also trying to figure out the greater mystery that brought them all together.
Obviously, Robin and his brothers would be main characters. Robin, with his skills and leadership within the Titans. And his brothers, who would bring their own personalities and abilities to the story.
Obviously, Harry's kids would be the main characters. They could be the ones driving the story forward with their curiosity about their father's past and the Dursleys. And of course, the Dursleys themselves. Vernon, Petunia, and Dudley. They are important as they are the connection to Harry's difficult childhood. Their reactions to the kids would be a major part of the story.
Based on the title, the main characters are most likely to be various versions of Shirou. They are coming together to meet and make an oath. There might also be other supporting characters, but the focus seems to be on these Shirou characters in the context of the snowy setting.
There could also be new characters created specifically for this fanfic. Maybe a mysterious wizard who has a connection to Hermione's family history. This new character could bring new challenges and storylines to the fanfic, while still revolving around Hermione.
Obviously, Peter (presumably Peter Parker, Spider - Man) would be one of the main characters. And of course, the Avengers members like Iron Man, Captain America, Thor, Hulk, Black Widow, and Hawkeye are likely to be main characters too as they are the ones 'meeting' Peter.
Obviously, Rhodey and the Avengers members like Iron Man, Captain America, Thor, Hulk, etc. would be the main characters.
Splinter is also likely to be a main character. He is the turtles' master and mentor, and his wisdom often guides them in difficult situations. In this fanfiction, he might play a crucial role in helping the turtles face new challenges.
Obviously, the Avengers members like Iron Man, Captain America, etc. And the Warrior 3 which include Fandral, Hogun and Volstagg.
The marauders are the central figures from the past. James Potter could be a fun - loving grandfather, Sirius Black the cool and rebellious one. Remus Lupin would be the wise and kind grandfather. Their grandchildren could be a diverse bunch. There might be a Potter grandchild who is a bit of a troublemaker like James was. A Black grandchild who is very proud of their family heritage. And perhaps a Lupin descendant who is very studious and wants to learn all about Remus's life. Peter's grandchild might be a character who is trying to find their place in the family after Peter's betrayal.
The main characters could be the political leaders of the nations and the confederacy. They would be the ones making the big decisions in diplomatic meetings and negotiations. For example, a president or a prime minister from a nation, and a council leader from the confederacy.