Lysa Arryn
Catelyn's sister, widow of Jon Arryn, shut up in the impregnable Eyrie with her sickly son ÔÇö nervous, possessive, and not entirely in her right mind.
A soul of House Arryn, born at Riverrun.
The fuller tale
Season One
King Robert rides to Winterfell and asks Ned to be his Hand; the letter from Lysa accuses the Lannisters of murder.
Where they stand. The Eyrie.
Season Four
Lysa Arryn marries Littlefinger within the hour of his arrival ÔÇö and shrieks the truth of Jon Arryn's murder. Lysa sees a kiss in the snow and holds Sansa over the Moon Door; Littlefinger holds Lysa over it longer.
How it ends for them
On the screen. Fell from the Eyrie (S4┬ÀE7)
The Lady of the Vale confessed she'd poisoned her own husband at Littlefinger's word, and threatened Sansa at the Moon Door in a jealous fury. Petyr calmed her, kissed her once ÔÇö 'I have only loved one woman' ÔÇö and pushed her through it.
On the page. Out the Moon Door (ASOS, ch. 81)
She confessed everything at the Moon Door with her hands on Sansa's back ÔÇö the poisoned husband, the lying letter, all of it done for Petyr. Littlefinger pried her loose gently, said 'only Cat,' and pushed.
She dies at the Moon Door she loved to feed. In the show it comes moments after she has watched Petyr kiss Sansa in the snow: she drags her niece to the open door, raving, until Petyr talks her gently back ÔÇö and then tells her he has only ever loved one woman, her sister, and pushes her through. In the books the scene runs the same course at greater length, Lysa confessing the poisoning of Jon Arryn and the lying letter in front of the one witness who matters, before Petyr pries her fingers loose with a single word ÔÇö ÔÇ£only CatÔÇØ ÔÇö and lets the sky have her.
Either way, the man she killed for was the man who killed her, and her death is the storyÔÇÖs first full confession: everything the realm believed about the warÔÇÖs beginning was authored by the two people standing at that door. Only Sansa hears it, which is the point ÔÇö from that moment the girl knows exactly what her protector is.
Their chapters, book by book
A Game of Thrones 2 chapters that name them
A Storm of Swords 3 chapters that name them
Where the page and the screen part
The bones of her story match across the tellings, but the books supply the childhood that explains her ÔÇö the tansy, the forced marriage, the aborted child, all confessed in her final raving at the Moon Door ÔÇö where the show sketches the obsession and lets the history stay dim. The aftermath differs too: in the books Littlefinger frames the singer Marillion for her death and extracts a confession, while the show has him talk his way past the Vale lords with SansaÔÇÖs tearful, calculated testimony as his shield. Book-Lysa is also a shade more dangerous ÔÇö her jealousy of Sansa turns physical at the Moon Door itself, snow swirling into the hall while she screams the whole conspiracy aloud.
Their journey
Where the two tellings send them to the same place the road runs whole; where they part, the screen keeps the left and the books the right.