[SUGGESTION] Nickname Others

So, many of my friends have unpingable names or their name doesn't appear in the list from option nor on the member list as they are offline or the server has a lot of members. 

It would be nice to have a way to nickname others that can, as an option, cross servers. Meaning, I can name a friend with "『aodap』" this kind of username into just "ao" but only I would be able to see changes and ping him through just "ao". So it is mainly a personal feature for a better pinging system when sometimes people have just unreadable or unpingable names which is annoying.