Q: In this task, you will be presented with a text and a pronoun. You should write the name that the pronoun refers to. Position of the pronoun in the text is showed within two "_"s.
Upon Catelyn's arrival in King's Landing, she is brought to her childhood friend, Petyr ''Littlefinger'' Baelish, who identifies Tyrion Lannister, the dwarf brother of Cersei and Jaime, as the owner of the dagger used against Bran, and agrees to help Ned investigate the possibility of Lannister treason. During _her_ return to Winterfell, Catelyn meets Tyrion by chance on the Kingsroad, arrests him, and takes him to her sister Lysa Arryn's stronghold in the Vale, where Tyrion demands trial by combat and regains his freedom when his champion, a mercenary named Bronn, is victorious. <sep>, Pronoun: her
A:
Catelyn