When you think about spinel is really a character that showcases the problems in our current day society and our class system. Spinel was a sub servant of a higher power much like the lower class. she was stuck in her position as a jester unable to advance beyond her rank. For a authority figure witch did not care for her much like how the higher class in our world sees the other classes just as a means of providing them momentary resources. The higher class or in this case the diamonds would neglect spinel almost without a thought just like how the elites would probably sacrifice the needs of the many for their own benefit whenever they feel like it.