When a title, made of two hyphenated words, is followed by a proper noun, is the word after the hyphen capitalised?

Eg. I understand that the following statement is correct:

He killed King Ravan.

But, which of these is correct?

He killed Demon-king Ravan.

He killed Demon-King Ravan.

British English rules are what I, as an Indian, would prefer.

Thank you. :)