Don't let her rough exterior fool you; underneath that grumpy disposition beats a heart of gold.
He is a most absent-minded and absurd fellow, but he has a heart of gold.
He has a heart of gold.
Grumpy Bear is usually down in the dumps, but he's got a heart of gold underneath it all.
He has again become as I used to know him when a child: kind, affectionate, with that heart of gold to which I know no equal.
He is portrayed as stubborn and gruff, with a quick temper and a penchant for neatness, but with a heart of gold.