Seamus Finnigan (b. 1979/1980) is a half-blood wizard, son of Muggle Mr. Finnigan and Irish witch Mrs. Finnigan. Mr. Finnigan did not learn this until after they were married and it gave him a "nasty shock" when he first learned it.
Seamus is a Gryffindor student at Hogwarts School of Witchcraft and Wizardry. He was also the best friend of Dean Thomas. Seamus originally doubts Harry Potter's claim that Lord Voldemort had returned in 1995 (as his mother doubted it). However, late in 1995 he eventually joins Dumbledore's Army, an organisation taught and led by Harry Potter, after apologising to Harry.
In 1997, he continues his seventh year of education at Hogwarts, although the school is under the control of Voldemort. Seamus remains in the D.A. and fought bravely in the Battle of Hogwarts. It is currently unknown what he did after the Second Wizarding War.
Early life (1980-1991)
Hogwarts years (1991-1998)
Seventh year and Battle of Hogwarts
Later life (post 1998)
Personality and traits
Magical abilities and skills
Differences from the source material