If you have spent any time on BookTok, in shonen anime, or playing a JRPG made in the last twenty years, you have seen them: tiered ranks that climb from F at the bottom to S, SS, or beyond at the top. The rank system is not an aesthetic choice. It is a load-bearing piece of structure that quietly does five different jobs at once. Here is why readers love it, and how Shattered Crown puts it to work.
Where The F-To-SS Convention Actually Comes From
The lettered rank system did not originate in fantasy fiction. It came out of Japanese RPGs in the early 1990s — specifically the rank screens of games like Devil May Cry, Bayonetta, and arcade fighters — where the player’s performance was graded on a curve that started at F and topped out at S (or SS, or SSS, depending on how generous the designers felt). Anime borrowed it next. Solo Leveling, My Hero Academia, Mashle, The Beginning After The End — they all use some flavor of the same scale.
Western fantasy fiction picked it up over the last decade as the line between LitRPG, progression fantasy, and traditional epic fantasy got thinner. Today a reader who picks up a YA fantasy and sees “she had only just been promoted to B-rank” knows instantly what kind of book they are holding. That literacy — readers already understanding the convention — is a gift authors should not waste.
The Five Jobs A Rank System Does (When Done Right)
Job #1: It Makes Power Legible
Every fantasy reader has been bored by a fight scene where they cannot tell who is winning. Ranks fix that. When the protagonist is C-rank and the antagonist is A-rank, the reader feels the gap. When the protagonist closes the gap, the reader feels the climb. There is no need to spend three paragraphs explaining relative strength; the ranks have already done it.
Job #2: It Builds In Progression Without Promising It
Readers want to feel a character get stronger. But “she got stronger” is abstract. “She moved from C-rank to B-rank” is concrete — and crucially, it sets up the possibility of B-to-A, A-to-S, S-to-SS. Each promotion is a milestone the reader anticipates and savors. The ladder gives the story shape.
Job #3: It Generates Conflict For Free
Rank systems are political. They imply institutions that assign ranks, gatekeepers who test them, hierarchies that reward them. The moment you say “ranks exist,” you have a kingdom of stories about who decides ranks, who refuses to be ranked, who is ranked too low, and who lies about their rank. None of that conflict needs to be invented; it falls out of the system itself.
Job #4: It Lets You Foreshadow Without Telegraphing
If the antagonist is established as SS-rank in chapter two, the reader spends the rest of the book quietly afraid every time the antagonist appears. You do not need to remind them. The rank does the emotional work in the background. Then when the protagonist finally faces the antagonist, the reader is already braced — and the protagonist’s eventual victory feels earned because the reader has been carrying the dread for hundreds of pages.
Job #5: It Gives Readers Something To Argue About Online
This sounds frivolous and it absolutely is not. The largest engine of YA fantasy sales right now is reader-to-reader recommendation, and the conversations that drive recommendations are conversations about who would beat whom, who is actually the strongest, which rank is most underrated. Rank systems give readers vocabulary for those conversations. Books with rank systems get talked about more. Books that get talked about more get sold more.
How Shattered Crown Uses Ranks
The Shattered Crown trilogy uses an F-through-SS scale, color-coded by element. Blue lightning, orange fire, purple void, green growth, white truth, black silence. Each color is its own discipline with its own rules.
What makes the system do real plot work is the relationship between rank and cost. Promotion is not free. To go from B to A in any color, the user has to give up something concrete — a memory, a relationship, a year of life, a piece of who they used to be. The trilogy’s central question is whether Kael, who is rank F when we meet him and destined to be SS, will pay every price the climb demands. Some characters say no and stay where they are. Some characters lie about what they paid. One character pays everything and discovers, in Book 3, that the system was lying to her all along.
That last sentence is the actual reason for the rank system in this trilogy. It exists so that, at the end, the reader can experience the betrayal of believing the rules.
The Common Failure Mode
Bad rank systems are bad in the same way: they are decorative, not structural. The author labels everyone, then forgets to use the labels. A C-rank character defeats an A-rank character with no explanation. The protagonist’s rank progression happens off-page. The system stops mattering, and the reader stops caring.
If you are using ranks — or thinking about it — the test is this: If you removed the rank labels from your manuscript, would the story still make sense? If yes, the ranks are decoration. Cut them or commit. Decorative ranks are worse than no ranks, because they signal a system the book is not actually delivering.
Why Readers Will Keep Loving This Trope
The F-to-SS convention is going to keep growing in Western fantasy for the next decade, for the same reason Marvel movies did: it gives readers a shared vocabulary, predictable beats, and unpredictable executions inside those beats. The structure is the safety. The story is the surprise.
If you want to see how the rank system makes the trilogy work, Shattered Crown: Awakening is the entry point. Read Book 1 on Amazon or free with Kindle Unlimited.
And if you want the worldbuilding worksheet I used to design the rank-and-cost system — including the diagnostic for whether your own ranks are structural or decorative — the AI Novelist system has it. See the system here.
