Cliques are pretty plain to see, while some others are basically loners, and Maguire, Greenwood and maybe 1 or 2 others are either actively disliked or not respected by some of the bigger egos.
Cliques don't necessarily mean theres overt hate/animosity, but it definitely can lead to not enjoying your palace of work if you're an outsider, weird power dynamics and a subconscious impact on behaviour.
Obviously they need to rise above all of this, but it is fascinating and actually quite relatable to real workplaces.
There's a reason why some managers insist of certain rules e.g. around mealtimes, sitting in mixed groups, team bonding etc.