Who is on Arya’s Kill List?

For Ordering the beheading of her father Eddard Stark. See why did Eddard Stark die.

Cersei had Eddard imprisoned and charged for treason. As a result Eddard was killed.

Walder Frey was in charge of the red wedding where both Catelyn and Robb Stark were killed. (See Why did Robb Stark die in Season 3?)

Arya believes Meryn killed Syrio forel.

Tywin Lannister planed the Red wedding with Walder Frey and as a result got both Catelyn and Robb killed. (See Why do the Lannisters hate the Starks?)

Arya didn’t like Melisandre because she took her Friend Gendry. She also believed she is a witch.

For selling Gendry to Melisandre in exchange for Gold.

For selling Gendry to Melisandre in exchange for Gold.

Ellen Payne was the one who carried out the execution of Ned Stark.

For torturing prisoners and children who were held in Harrenhal.

For killing Myach , the butcher’s boy, who was Arya’s friend.