It was previously speculated that Chell might be Test Subject 234, since "234" is featured on the bed in her Relaxation Vault, but this was disproved in Portal 2: Lab Rat, which states that Chell was Test Subject #1498, until Doug Rattmann changed her to Test Subject #1.
List of appearances
- Portal (First appearance) (Clipboard only)
- Portal: Still Alive (Non-canonical appearance) (Clipboard only)
- Portal 2 (Clipboard only)