To be honest, Reiger really didn't understand why, after suffering such treatment, the Paradise Fairy still insisted on saving Britannia, saving the fairies.
From her time as Vivian, known as the Fairy Era of 4000 years ago, to the present Fairy Era of 400 years, there had indeed been a full 3600 years in between.
For a whole 3600 years, she had managed to persist amidst constant persecution, striving to eliminate the threats brought about by the "calamity" and saving the fairies who persecuted her, which could no longer be described simply as goodness.
The Paradise Fairy was obviously not just a naive do-gooder either, otherwise, she wouldn't have developed mistrust, vigilance, and even hatred towards fairies.
Yet even so, she still persisted in saving Britannia, and Reiger really couldn't understand what the Paradise Fairy was thinking.
Of course, this was an emotional issue.