According to the Oxford Reference of Literary Terms (3rd ed.) , a (literary) character is defined as "a personage in a narrative or dramatic work," as well "as also a kind of prose sketch briefly describing some recognizable type of person" in a literary and/or dramatic work. The Mariam-Webster dictionary also usefully adds that it represents "a short literary sketch of the qualities of a social type." (141)
Similarly, the Oxford Companion to Theater and Performance offers a more succinct definition: "In narrative generally, a character is a person depicted within a story, either through description or direct speech; in drama the term usually refers only to persons portrayed by actors."
There are many different types of characters. In general, we can recognize the following types of characters:
The Protagonist, the main character in the narrative,
who is often opposed by, the antagonist(s) who often stand(s) in opposition to what the protagonist in trying to accomplish.
The conflict between the protagonist and the antagonist is often supplemented by an array of other characters type, who play an important role in shaping the story.
Here we recognize the following types:
Flat characters- usually don't stand out; have very few defining traits and their personal history often remains elusive. (or non-existent) Often, their usage in the narrative is to fill in the gaps in the story. They do not change over the course of the narrative!
Round Character in many ways is the opposite of the flat character- they change throught the narrative and as the story progresses becomes quite complex. Further, their exact morality and/or intentions can be elusive and difficult to pinpoint.
Dynamic Character changes throughout the story, in both the constructed-by-the-narrative positive or negative way.
Confidante Character serves to highlight the protagonist's virtues. (or sometimes faults) In most circumstances, this is a character that the protagonist trusts and assits in the character development through the narrative.
Examples of types of characters:
Zenobia is the main character of the novel. She uses her computer skills to discover the identity of the mysterious hacker who posted hateful content on her school's website.
The narration also focuses intensly on her throughts and relationships with others through 2nd. person excerts found throughout the novel. The books revolves around her.
Throughout the story, the leadership of the Juniper village opposes the main character's (Addie) desire to build a monument to the witches which were executed in the village a long time ago.
Herve from The Mission Child by Maureen F. McHugh
Herve is a doctor Jan meets during his stay in the big city. His main purpose in the story is to help Jan with his gender transition. Aside from helping that plot thread get along, we don't know much about Herve- his personal history, his personality, etc.
Throughout the story, Noah receives significant attention from the narrative, as he is the main character, Gregor's, boyfriend. Throughout the story we learn much about his inner world, thoughts, as well as personal history.
The Author themself from Gender Queer by Maia Kobabe
Throughout this graphic memoir, author's core identity goes through several dynamic changes and realizations, until they realize and fulfil their true self.
Tori Spring from Heartstopper by Alice Osemann
Throughout the story, Tori represents a confidant to the main character, Charlie, listening to his struggles with mental health and sexuality.
Her own journey with her own sexuality (she is asexual) also brings a new perspective onto her and Charlie's relationship and makes her otherwise thought-and-cheek attitude something sympathetic.
References:
"Character." Merriam-Webster Online Dictionary. https://www.merriam-webster.com/dictionary/character
Baldick, Chris. Oxford Dictionary of Literary Terms. Oxford University Press, 2008.
The Oxford Companion to Theatre and Performance, Dennis Kennedy, editor, Oxford University Press, 2010.
BONUS:
Examples from the novel I am working on! It's working title is Svim Iskrama (eng. To all sparks)
The year is 999,999,945 and humanity rules almost the entirety of the Universe. One of the last planets conquered by the Terrans is Belehradski Geosvod. While the brutal 4-hour war is over, a battle for the memory of the past still stands- and the one to fight it is an autistic sex worker Zuzka.
The Protagonist
Zuzka
Zuzka is the narrator of the story and plays the pivotal role in it, and the majority of the novel's plot focuses on her schenanigans in the city of Belehradski Geosvod in the year 999,999,945
The Antagonist
Admiral Gena Lakan
One of Zuzka's clients who also happens to be the second-in-command of the intergalactic force that occupied Zuzka's planet. Throughout the story, Gena attempts to assimilate Zuzka, a native, into his society but ultimately fails. He is persuaded by Zuzka to adopt a more sympathetic attitude towards the native population.
Flat Character
The Crusader Princess Nera'anum
Another of Zuzka's clients, appears sparingly throught the story and allows Zuzka to eek out information about the world.
Round Character
Johana
A commander of a battleship who went rogue, appears about halfway through the novel and becomes Zuzka's second wife. Initially depressed and disillusioned with the world in general, she comes out of her shell and gradually develops identity as a parent of their child, Leonor.
Dynamic Character
Heiki
Zuzka's first wife and one of the very first characters we meet. Initially presented as a poor parent to Leonor and incapable of providing a stable life, she gradually finds her way of being stable in a partnership with Zuzka and Johana.
Confidante Character
Zum-Zu
Zuzka's pet Blob, a species native to Belehradski Geosvod. Throughout the story Zuzka shares her intimate thoughts with him and despite not being able to talk, her Blob does manage to provide her with ample advice.