Cathal Garvey is a user on social.coop. You can follow them or interact with them if you have an account anywhere in the fediverse.
Cathal Garvey @cathal

I am genuinely happy to have learned about the trick where, if you paste a user's URL or a Toot's permalink into your home-instance's "Search" box, it comes up in your home instance window. This lets you more easily remote follow, or retoot, or favourite stuff that you found in another tab on another server. :)

@cathal Yeah I do it all the time 8-) It's a pretty cool feature.