Yes, if they are UTF-8 characters!
Some of these characters display as emojis on devices that support emojis. Others will display as text icons.
View a list of of supported UTF-8 characters here. You can copy the characters from the righthand column of the list and paste them into, for example, your alerts.
Related articles:
- Can I use symbols like commas, semicolons, etc. for locations (rooms, booths), tracks and metadata?
- More on UTF-8 and character encoding: What does "Bad character encoding" mean?