Character drift is the #1 reason AI video looks 'AI-made'. LearnBook's identity anchor system folds reusable characters into every prompt — Sora 2, Veo 3, Kling, Seedance — so the protagonist stays on-model from scene to scene.
Generate the same character twice with a vanilla AI video model and you'll get two different faces. The fix shouldn't be 'rebuild the prompt by hand every shot' — it should be 'attach the character once'.
Identity anchors, model-agnostic
Once you save a character, LearnBook derives a 6-layer identity anchor (bone structure, features, marks, colour, skin, hair) and folds it into every prompt — regardless of which video model you pick.
Reference frames + cross-shot binding
Lock a hero frame from the Visual Workspace, then bind it to multiple shots in the Video Workspace. Image-to-video models (Kling) carry the visual; text-to-video models (Sora 2, Veo 3) carry the anchors.
Anchor versioning
Refine the character mid-project? LearnBook bumps an anchor version and flags every shot that needs a re-render — no silent inconsistency creeping into the timeline.
Step 1
Save the character once
Add a name, a reference frame, and a short visual description. LearnBook derives identity anchors automatically.
Step 2
Bind the character to shots
From the Video Workspace, attach the character to each shot. The anchor flows into the prompt for whichever video model you select.
Step 3
Render across models, stay consistent
Run the same shot through Sora 2 for the hero motion and Kling for fast iteration. The character looks the same in both — that's the contract.
The LearnBook surfaces this use case routes into.
Yes. Identity anchors are model-agnostic — LearnBook injects them into Sora 2, Veo 3, Kling, Seedance and Nano Banana Pro prompts using each model's expected format.
The Pro plan covers a working library of dozens of characters; Team and Enterprise extend this with shared libraries across users.
Yes. Editing the character bumps an anchor version. LearnBook flags every render produced under the old version so you can selectively re-generate the affected shots.