An easy way to show off your lighter side, without having to put that much effort in, are GIFs. They can be used to emphasise shorter messages and show off a little brand personality.
Here is how to add a GIF to your tweet:
When you are composing a tweet, select the GIF button under the text box. A selection of GIFs will then appear for you to choose from.
Alternatively you can visit Giphy and search for a GIF that relates to your message.
Upload the GIF as you would a photo to your tweet and see how it resonates with your audience.
Remember to stay away from anything controversial or political.
For other useful tips about showing off your lighter side, see: Have some fun with GIFs and How to get more engagement by using images on Twitter.