Ask a room of AI creators why their series drift and most will blame the model. Watch their prompts, though, and the cause is clerical: the character is re-described from memory every time, and memory edits. One session she has “long copper hair,” the next “auburn waves,” and the audience watches a stranger take over the feed. The fix is boring and total — write the character down once, in a block of text you paste, not a description you retype.
The anatomy of a block
A working character block has five anchors, in this order: age (always 25 or over, stated as a number), hair (colour, length, one style default), build (two or three words, no more), face (one or two durable details — freckles, a strong brow, green eyes), and a signature (the tattoo, the ring, the beauty mark that survives cropping). Everything else — wardrobe, set, light, pose, mood — is a scene line, and scene lines are supposed to change.
Two rules keep the block healthy. First, anchors are phrased positively and concretely: “long copper hair in a low ponytail” survives generation; “beautiful hair” is an opinion the model interprets differently each time. Second, the block is versioned. When you deliberately evolve the character — a haircut arc, a new signature — save the new block as version two and date it, so old sets remain reproducible.
Running a series on the block
Production then becomes mechanical in the best way. Brief a set by pairing the block with three to five scene lines sharing one setting and light setup. Generate wide at the standard model’s 6-credit price, cull to the best third, and only then spend on edits, swaps and upscales. When a frame comes back off-character, the diagnosis is fast: either a scene line contradicted an anchor (a “short bob” scene line fighting the block’s ponytail) or the block itself has a vague anchor to tighten.
What the block cannot do
It cannot rescue a character who was never visually decided. If your anchors are adjectives — gorgeous, stunning, perfect — no system will hold her. Decide the woman on paper first. The block is not where creativity happens; it is where creativity is stored.