"Don't talk about Kleux."
Featherlie and her sister, Heather are both orphaned due to their parents being sacrificed to Kleux, The Goggles she wears are normal Copper armor goggles, but she wears them all the time because they belonged to her father who she looked up to. Featherlie now has a grudge against Kleux, seeming to want to attack people who worship him, even if it's her own kind. Sometimes she can restrain herself though.
I'm not confident that the japanese matches the phrase I was going for, but I tried.