Merrin Meredith was once the apprentice of DomDaniel. He had been known as Septimus Heap because Septimus was the seventh son of a seventh son, and DomDaniel wanted him to be his apprentice. But when he was taken to the Young Army by the midwife, she set him down and picked up her own son, Merrin Meredith, and as a woman came in, she thought that the midwife was holding Septimus. She tried to stop the woman, but this just made her pull even harder. She took Merrin to DomDaniel and has been called Septimus Heap until Boy 412 discovered his parentage. He then lived with Aunt Zelda after she saved him after being Consumed by DomDaniel. He was then the charge of Simon Heap, and once the Master of Sleuth, until Simon retained posession. His least favorite thing is being told he is stupid.