- Severus Snape (in Bothering Snape and Trouble at Hogwarts)
- Lord Voldemort (in Trouble at Hogwarts and Ron's Disease)
- Harry Potter (in Ginny)
- Harry Potter (by Snape and on himself)
- Ron Weasley (by Snape)
- Severus Snape (by Voldemort)
- Avada Kedavra is the only spell borrowed from the actual Harry Potter series.
- Voldemort has even sang a song about it under the same title.