Sceb's Hair-B-Back Test Subject

Sceb's Hair-B-Back Test Subject # 1 is an unnamed person that only appeared in Mailbag 21 and Mailbag 50. His only line is "Um... this kinda (something) bad." and a scream. He screamed as the "Hair-B-Back" went into his eyes. In Mailbag 50, it said may he rest in peace. Because of that statement it is unknown if he's still alive. However, JKR said "He guess he's toast.", probably meaning he is dead.