There are interactive social animations and emotes.
Some animations will be agreed-upon emotes that you can initiate with other characters.
The Founder's dance is a backer goal reward from the Summer crowdfunding campaign.
Emoji adds additional flare either for chat or character representation. Emoji packs were available in the Kickstarter and Summer crowdfunding campaigns at the Explorer level and above.
There will be role-playing emoji such as dice rolling.