Borderlines
Narcissists
Click on the linked names for media critiques, fan-fiction, interviews, and other material about each character. So far, these analyses have not ventured into the characters' psychology, but I am seeing BPD/NPD couplings everywhere on Glee.
Post a comment if you disagree or want to make additions, revisions, or web-links to this list. For more information on this relationship structure, see Joan Lachkar's book on the subject.