e.g. Clicking on:

Let's you:

and get to:

But you first have to add members, out of your 'friends' list, but I'm not seeing how to add, invite, or manage, such friends.

One way (thanks Aryianna) ...

Preparation:

Could pick a post in the forum and click 'send message', e.g.

Once you see them in your Plarium chat, perhaps having sent them a message:

e.g.

You can click on the 3 dots ... at the right and choose View Profile.

Up will come a web page, like:

Whereupon you can click ADD FRIEND.

Hopefully someone has discovered and can share some easier way to do this.

e.g. From one's profile, click Friends along the top, and have Search search the community, not just the friends you already have.

The 3 dots aren't present until a (test) message is sent.

Even then, the 'add friends' click point is not in evidence.

It seems that one must then go back into that test conversation, from within the Plarium chat app, NOT the Plarium forum.

Additional discoveries ...

When you show profile within the forum (by clicking on avatar of message sender), you get taken to something like https://plarium.com/forum/en/profile/###/ - which has no 'add friend' link.

When you do the same elsewhere, you get taken to something like https://plarium.com/en/profile/###/ - which has the 'add friend' link. The difference being one has a 'forum/' in the URL while the other does not. Note that the ###'s in each -are different-!

So, it seems the easiest way to get to the 'add friend' link is to click on the avatar here in forum, send a test message, find that message in your game window with the plarium chat above it, click view profile there, then click add friend in the resulting page.

SHEESH!