Luna. Princess of the night, patron of astronomy and regent of the moon. And above all, nocturnal. Which is why it's a problem when the changelings disturb her slumber during the Royal Wedding invasion.
Luna's not a "morning" person, as it were, and a thousand years on the moon has done nothing to dampen her temper. And to add insult to injury, she has to deal with the death of a close friend less than thirty seconds after waking up.
Those changelings' arses are grass, and Luna's got the weed-whacker.