Without having read the 'true detective graphic novel', we can only speculate. There may be a main detective as the central character, someone with a troubled past that gives them an edge in solving cases. There could be a supporting cast of characters such as a forensic expert who helps analyze evidence, a police captain who gives the detective their orders or resources, and a femme fatale - type character who may be involved in the mystery in some way, either as a victim, a suspect, or a key informant.
The most prominent character is Detective Pikachu. He is the one driving the story forward with his detective skills. However, there are likely other supporting characters as well. In the Pokémon universe, other Pokémon might also play important roles, either as witnesses, suspects, or helpers. And as mentioned before, there could be human characters who interact with Detective Pikachu, forming a partnership to solve the various mysteries presented in the graphic novel.
Detective Pikachu is surely one of the main characters. There might also be other Pokemon and human characters that play important roles, like Tim Goodman who is often associated with Pikachu in the Detective Pikachu storylines.
There might be a lead detective who is really smart and has a lot of experience in solving crimes in Chicagoland. There could also be a sidekick, maybe someone with a special skill like being really good at forensics or having a great knowledge of the city's underworld. And perhaps there's a female detective who brings a different perspective to the cases.
For 'The Sandman', Dream is a central character who has a detective - like role in the world of the occult. He traverses different realms and solves problems related to dreams, which are often intertwined with the occult in the story. In 'Hellboy', the eponymous character Hellboy is a key figure. He has a big red hand that is a sign of his demonic origin and uses his strength and wits to battle occult forces.
Nancy Drew is the primary character. However, she often has her friends Bess and George by her side. They sometimes assist her in solving the mysteries, and each has their own unique personality. Bess might be a bit more timid, while George is more tomboyish and practical.
Obviously, Batman is one of the main characters. And Commissioner Gordon also plays a significant role.
I'm not entirely sure as I haven't read every version, but usually there is a main character who is on the journey of self - discovery regarding beauty.
I don't know the exact main characters in 'true friends graphic novel'. However, in such a graphic novel, there might be characters who are brought together by a common interest or a shared situation. For instance, they could be neighbors who discover they have a lot in common and form a strong bond. There could also be a character who is new to the area and the others befriend him or her.
Since I haven't read it, I can't say for sure. But it could have the investigators as main characters, like the lead detective.
I'm not sure specifically for this one. But usually in True Detective shows, there are tough and determined detectives as main characters.