Thread:AlexHoskins/@comment-36740624-20190215032815/@comment-5964028-20190217013128

It is apparently associated with characters who are who seemingly remain calm and composed. Though they act serious on the outside, they often have a very dry, sarcastic sense of humour. They tend to have deep love for someone (whether romantic or otherwise) but are afraid to show it too often because they view it as a weakness, either because of who they are or because of the situation they are in.

And about the link for the Hero Song Wiki, here.