Talk:Twilight's Kingdom - Part 1/@comment-11159205-20140509085632/@comment-10390252-20140509092825

Well, I think 'kingdom' is the wrong description; 'realm' is closer. Celestia's realm is the day and learning, Luna's is night and dreams and Cadence's is love. In those terms, Twilight's realm is Friendship.

She's a princess of Equestria though, second in the line of succession after Luna and Celestia, so all of Equestria is her 'kingdom'.