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
