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Consistent AI characters in Google Flow for beginners

Learn how to build persistent AI characters, voices, and model sheets in Google Flow, and discover how to generate seamless images and multi-shot video scenes.

AI Edge Mastery

“How To Use Google Flow to Create Consistent AI Characters & Videos | Full Tutorial for Beginners”9:26

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Summary by OakgenPublished 4 min read

In 30 seconds

  • Google Flow allows you to store a character's face, voice, and traits in one place for reuse across multiple images and videos.
  • Using character turn-around model sheets significantly boosts visual consistency across diverse camera angles.
  • You can insert saved characters into prompts using the '@' symbol in Flow's interface.
  • Multi-shot text prompts let you create complex, sequential cinematic actions with the same character.
  • Chaining generated scenes together can be achieved by extracting the final frame of one clip to seed the next.

0:00Intro

0:00

Introduction to Google Flow Characters

0:00 to 0:23 in the video, under a minute

In AI-driven filmmaking, maintaining consistent characters across multiple scenes has traditionally required complex workarounds and disparate tools. Google Flow streamlines this workflow by unifying image and video generation under one roof.

Rather than recreating your subject from scratch for each prompt, Flow allows you to establish a persistent identity with a defined face, voice, and personality that can be reintroduced across any scene.

0:24

Building a Consistent AI Character

0:24 to 4:51 in the video, about 4 minutes

When starting a new project in Flow, the recommended workflow is to set up a dedicated profile in the Characters tab before attempting any video generation. Flow provides four core ways to establish a character base.

  • Pre-built Templates: Instantly randomize and generate fully formed character prompts.
  • Custom Prompting: Build descriptive prompts manually or with external AI tools like Claude to define exact facial features, age, and lighting.
  • Existing Project Assets: Select an image generated earlier in Flow or from a prior project.
  • Direct Image Uploads: Import an established character portrait directly into the platform.

Character Setup and Voice Selection

Once a base portrait is established, assign the character a unique name, avoiding names tied to real-world celebrities or common figures so the model does not draw unwanted bias. An optional character description field allows you to outline their typical demeanor, speaking style, and emotional reactions.

You can choose a default voice from the library or create a custom synthetic voice. By picking a base profile, writing sample dialogue, and adding performance instructions such as tone and pitch, you can preview and save an audio profile tied directly to that persona.

Refining with Character Sheets

To ensure Flow captures your subject accurately from every angle, you should add a multi-view model sheet showing the character from the front, side, and rear.

You can generate these turn-around views directly in Flow or use external image generation tools with a template grid. Once uploaded to the character profile, the multi-view reference anchors the character's facial structure and attire across diverse scenes.

4:52

Generating Images with Saved Characters

4:52 to 6:04 in the video, about 1 minute

Using your character in image generation is straightforward. In the prompt bar, simply type the '@' symbol followed by the character name, or choose them directly from the character menu.

You can combine the character tag with background images, other character assets, or pure text prompts. For example, you can place your character into a scenic mountain trail or a Swiss village simply by writing the action while referencing their profile.

6:05

Creating Consistent AI Videos

6:05 to 9:25 in the video, about 3 minutes

Google Flow supports two primary approaches for character video generation: converting existing still images into motion, or prompting the video model from scratch using descriptive text.

  • Image-to-Video: Upload a still photo of the character and describe the camera motion and actions. You can designate assets as 'frames' to lock the starting view, or as 'ingredients' to guide composition loosely.
  • Text-to-Video: Type a detailed prompt with the character tagged. With multi-shot prompts, you can choreograph shot transitions, such as moving from a medium tracking shot to a dramatic close-up.

Chaining Multi-Clip Scenes in the Timeline

If your selected video model does not support native clip extensions, you can manually build a sequence by exporting the final frame of a completed clip. Upload that closing frame as the starting reference for the subsequent prompt.

Flow's built-in timeline editor allows you to trim clips, rearrange sequential shots, and assemble a smooth continuous scene before finalizing the render.

Final Thoughts

By centralizing character identities, model turn-around sheets, and custom voices inside Google Flow, creators can significantly cut down the friction of AI filmmaking. The platform provides a viable pipeline for producing cohesive, narrative-driven content from start to finish.

Do this yourself

Make one character image to reuse everywhere

The video creates one character, then reuses it for new images and for video. Make your character's first image in the image generator and keep it as the reference for every image and clip that follows.

Also on Oakgen: Keep AI characters consistent, AI video generator.

Open the image generator

Questions

How do you tag a saved character in Google Flow prompts?

You can insert a saved character into any prompt by typing '@' followed by the character's name, or by selecting them directly from the project's Characters menu.

What is the difference between Frames and Ingredients in Flow video generation?

Frames lock down the very first frame of your video so the animation begins from an exact still image, while Ingredients guide the general appearance of characters or objects across generations without freezing the opening shot.

How do you continue a scene if the video model cannot extend clips directly?

You can save the final frame of the generated clip as an image, upload it as a reference for the next prompt, and then trim and combine both clips on the timeline.

This is a summary of a public video by AI Edge Mastery. The method and the demo are theirs: watch the original. Oakgen wrote the summary.

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