From A Wiki of Ice and Fire
An assassin is one who commits a targeted murder or assassination, mostly for political reasons. They may act alone or in organised groups, or even be created by magic.
- A Catspaw, hired to murder Bran Stark while he lay in a coma.
- A wineseller, who tried to kill Daenerys Targaryen and her unborn son with poisoned wine.
- The Alchemist.
- The Faceless Men, a religious society of assassins based in Braavos.
- The Sorrowful Men, an ancient guild of assassins from Qarth.
- A shadow assassin, a form of magic used by the shadowbinder Melisandre of Asshai.
- Jaqen H'ghar
- Arya Stark
- Blood and Cheese, who were hired by Daemon Targaryen to kill the young son of Aegon II, Prince Jaehaerys.
- Tessario the Tiger, a sellsword in the service of Unwin Peake, who may have murdered young Queen Jaehaera Targaryen.
Survivors of Attempted Assassination
- A Game of Thrones, Chapter 20, Eddard IV.
- A Game of Thrones, Chapter 54, Daenerys VI.
- A Feast for Crows, Prologue.
- A Game of Thrones, Chapter 33, Eddard VIII.
- A Clash of Kings, Chapter 44, Tyrion X.
- The World of Ice & Fire, The Free Cities: Braavos.
- A Clash of Kings, Chapter 40, Daenerys III.
- A Clash of Kings, Chapter 42, Davos II.
- A Clash of Kings, Chapter 30, Arya VII.
- A Clash of Kings, Chapter 38, Arya VIII.
- A Dance with Dragons, Chapter 64, The Ugly Little Girl.
- The Princess and the Queen.
- The World of Ice & Fire, The Targaryen Kings: Aegon II.
- Fire & Blood, The Dying of the Dragons — A Son for a Son.
- The World of Ice & Fire, The Targaryen Kings: Aegon III.
- Fire & Blood, Under the Regents - War and Peace and Cattle Shows.
- Fire & Blood, The Lysene Spring and the End of Regency.