Anyway, here we have four original characters, three of them are unicorns and one is an earth pony.
The unicorns are looking down on the earth pony because they think she is a lowly labourer. Little did they realize they were talking to a rich business-pony.
Yes, the three of them are racist because they think unicorns are better than any other race, and that other races are nothing.
There’s a reason I don’t want to put in names for them. It’s because you can imagine them to be whoever you want them to be.
P.S. - I’m not saying your original character has this kind of thought if he/she is a unicorn. This is just my original characters’ behaviour. Sorry if I offend your OCs.