At the moment, only one free emotion is available, but most likely new emotions will appear in the future, including paid versions.
Emotions are selected in a new special section of the character editor.
There are a total of six slots available for choosing emotions.
On Windows 10, the emotion selection screen is turned on by the B (Russian) button, a special button is available on mobile devices near the pause and chat buttons.
Example of emotion:
And here's how it looks from the outside:
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