Spalison

Spalison is the friendship pairing between Spencer Hastings and Alison DiLaurentis. They are former rivals, too.

Relationship
Alison's relationship with Spencer is very different. Spencer and Ali were always fighting, and trying to out-do each other. Ali usually leaves Spencer annoyed with her and Ali distressed because Spencer is the only one of the four girls who could ever stand up to Ali, which fact first comes apparent in "Pilot, when they have their argument in Spencer's house, the night of Ali's disappearance. There, Ali threatens to tell Melissa about Spencer's kissing Ian or else she will. Spencer yells at her that if she should so say one word to her, she'll tell everyone the truth about "The Jenna Thing." Also in "If At First You Don't Succeed, Lie, Lie Again" she is again seen pressuring Spencer to tell her sister about Ian. (This is hypocritical considering the fact that she was secretly dating Ian, and Alison probably did it in order to make Spencer look bad while getting Ian to herself.) Spencer tells Alison that she is sick of her games, and Alison is dead to her already. Alison appears distraught, then Alison leaves angrily, and Spencer follows her. Spencer is the most like Alison: smart, determined, sophisticated, and will do just about anything to be the best.