Who is Euan MacIntyre from Possession: A Romance and what is their importance?

Euan MacIntyre is a solicitor who is in love with Val. He meets her when she comes to his office to work as a typist. Euan is wealthy, charming, good looking, and successful, and he truly loves Val. He treats Val like a princess and also helps to hatch a plan that ultimately solves the mystery of the relationship between Ash and LaMotte.