I am a big fan of adding Bitmoji to all of my digital materials because it allows me to add ME to the materials. This way students feel their teacher is giving the directions rather than just a cold page of text.
Bitmoji Chrome Extension
If you have not already made a Bitmoji on your phone you will need to start there. Then you can install the Bitmoji Chrome extension
When you click on the Bitmoji Chrome extension it will allow you to search for Bitmojis.
If I type in Alice Keeler there should be no Bitmoji's that say that. BUT Bitmoji will create custom ones for you with the search text you type. So notice in the screenshot below there are 11 Bitmoji's with my name on it.
Sometimes I do not like the custom Bitmoji's. So I will highlight my search and use Control X to cut out the search words. Control V to paste it right back so it will give me different ones to choose from.
Right Click - Save Image As
You can drag your custom Bitmoji right onto Google Slides. However, you may want to save the custom Bitmojis. Right click on the Bitmoji in the Chrome extension to "Save image as."