Hello Y'all

Here is a screenshot of the players and enemy icons and status, i'm not sure about what they all mean, can you help me on the meaning of each one and what info they can display?



1 - I think it's enmity right? The player with the bar full has full enmity on the enemy pack?

2 - What are these letter, I have seen " L " and " A "

3 - This letter I think is to identify enemies from A to Z?

4 - ??? I've seen here square and triangle

Thx for additional info on 1-2-3-4