Denethor

The Steward of Gondor during the War of the Ring. Father of Boromir and Faramir. Went a bit bonkers towards the end due to the Evil influence of Sauron via Palantir.

His death at the end of the Return of the King movie has led to one of the PPC's most well-known expressions of surprise.

In Badfic
Denethor is an abusive father who doesn't care one whit about Faramir, or in extreme cases, about either of his sons. He could also be one for indulging in Incest.