Explaining the joke for those less versed in FF14: Erenville (the Viera on the left with the tea), despite being a major NPC ally, can not be recruited to assist in dungeons/battles via Trusts or Duty Support and thus never gets involved in combat like the others involved here
Given that Dawntrail's combat encounters are gathering a reputation for being a good deal harder than previous expansions, even for non-raid, main story content, this may be a wise choice
I'm pretty sure that Kimberly lady is an OC? The chain of QRTs makes it seem like a few fans are trying to make their own AUs because of how poorly done the game was (in their eyes) and the artist drew this as one of those AUs.