Using find, how to classify like ls -F ? (directories with a trailing slash)

I use find to get a list of files, then I grep it to do a path matching :

$ find pc* | grep -i arthur
pc6/arthurv/untitled-2.py
pc6/arthurv/untitled-3.py
pc6/arthur.py
pc9/Arthur 4C
pc9/Arthur 4C/untitled-1.py
pc9/Arthur 4C/untitled-2.py

I would like to do like in ls -F and append a / for each directory.

Alternatively, how do I get find to show all directories matching case insensitive arthur ?