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.