> For the complete documentation index, see [llms.txt](https://docs.fullscreen.no/info/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fullscreen.no/info/standalone-assets/herobridge-standalone/components/sidekick-expression-applier.md).

# Sidekick Expression Applier

The **Sidekick Expression Applier** component allows you to change a character’s facial expression by applying predefined facial blendshapes.

Expressions are exported during cache generation from the runtime facial demo animation controller included with the **FREE Starter Pack - Sidekick Modular Characters**.

**Apply Mode** defines when the component runs:

* **On Enable** - Runs automatically when the GameObject is enabled
* **On Disable** - Runs when the GameObject is disabled
* **On Invoke** - Runs when triggered via code or events
* **On Button Press** - Runs when a Unity UI Button on the same GameObject is pressed

**Target**\
The Sidekick character the expression will be applied to.

**Expression**\
Select which facial expression to apply.\
There are **19 available expressions**, including:

* In Pain
* Happy
* Sad
* Angry
* Surprised
* Neutral
* and more

**Transition**\
Defines how smoothly the expression changes.\
The value represents the transition duration in seconds.

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