Eileen has no time for this nonsense and thinks cross-species relationships are a good thing. The Queen keeps a discreet silence on this issue, believing this is for her subjects to work out for themselves.
Generally speaking, the fairy royals spent centuries in trying to bring an end to fighting between the species (and succeeded). They also went on to try to improve relationships between the magical groups. Elves are no longer permanently at war with the dwarves but there is nothing the fairy royals can do to make either side like the other (bar those oddballs mentioned above).
But given many areas in the Fairy Kingdom have been made barren by magical fighting damaging the environment, this kind of tolerance ("we'll put up with you as it is better than war") prevails and most accept it is the best the magical realm will ever achieve. It has been known for ages magic is no way to resolve relationship difficulties as certain spells wear off after time, others can backfire if misused and magic was never meant to be used for that.
The Queen would like genuine tolerance to emerge and tries to encourage it when she goes touring but accepts this is a very long term task and she probably won't succeed in achieving this in her lifetime. Still that's no reason not to give it a go...