Cassie (played by Amelia Jackson-Gray) was Spencer's girlfriend in iStill Psycho. They went on multiple dates together and had kissed 3 times in the episode. She appears to be a fan of video games (since she bought one as a present) but a bigger fan of Spencer.
Cassie has a British accent, blonde, wavy hair and green eyes.
Cassie and Spencer appear to still be together at the end of the episode.
Their pairing name is Spassie.