How to add some symbols in your title

When I browsed other people's articles, I noticed that some of them had very nice symbols in their titles, like flowers or ornate floral patterns. I tried to find some sites where people could copy and paste the patterns and test them out here.

https://www.piliapp.com/symbol/

Also, when I use Lagrange, I notice that on each user's home page, there is a special pattern next to the username, like this

https://postimg.cc/SJ1MWFG7

Each user seems to be randomly different, is this something Lagrange comes with? Is there any way to change it? I'd actually prefer a boat anchor motif lol.