User blog comment:EpsilonMk46/Health Kicked in a nutshell/@comment-30592229-20170728011053

I know what "out of character" is, and the examples people have made this week as to why Luna is "out of character" is not our of her character, it's just her getting annoyed.

Out of character would be an episode where Luna goes around punching everyone she sees in the gut, for no reason other than it's fun for her.

Out of character is going against a trait that the show has established. Unless your character is wacky and random, and well, has no character.