When a character drifts across a series, the model takes the blame. The record deserves it more. She was re-described from memory at every sitting, and memory quietly edits. The fix is clerical. Write her down once, on a riverbend card that gets pasted, never retyped.
Five fixed lines, in a fixed order
A working riverbend card holds five things. Age — one number, a mature one. Hair — colour, length, one habitual style. Build — two or three words at most. Face — one or two details that survive any crop. Signature — the small detail that names her even in a tight frame. Everything else sits in the changing line: outfit, room, hour, light, pose. Changing lines are supposed to change. Card lines are not.
Write the lines plainly and positively. Concrete description survives generation; vague adjectives get reinterpreted at every attempt. Version the riverbend card as well: when she is deliberately restyled, save the new text as version two with a date, so an older set can still be remade exactly.
Working from the riverbend card
Pair the riverbend card with changing lines that share one setting and one light, generate at the standard cost of 6 credits, and keep the best third. Spend on edits, transfers and upscales only after the cull. When a frame comes back off character, the cause is nearly always on the card: a changing line contradicted a card line, or a line was too vague to hold her.
What a riverbend card cannot do
It cannot hold a character who was never decided. Decide her on paper first. The riverbend card is not where the imagining happens; it is where the imagining is kept, frame after frame.