Ernest 'Ernie' Macmillan was a pure-blood wizard of the Sacred Twenty-Eight Macmillan family who attended Hogwarts from 1991 to 1998, sorted into Hufflepuff. An academically driven student and later a prefect, he was a close friend of Hannah Abbott and Justin Finch-Fletchley.
Initially suspicious of Harry Potter during the Chamber of Secrets crisis, he became a loyal ally, joining Dumbledore's Army and fighting in the Battle of Hogwarts in 1998. Chronological detail is presented in the Timeline.
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