This is Rain.
He has a hollow heart. Full of depression. Full of sadness. Full of regret.

When a tear rolls down his patterned cheek, the skies let loose. But he feeds not, on his own worry, yet the worry of those he observes.

If you were ever sad,
and the skies above grew dark,
letting loose the rain,
then know he is watching,
and that he shares your pain.

If the world around Rain wasn't full of sadness then never would he cry. So think now, although you may be happy, others are not.