Riddles & Where to find them

Harry Potter - J. K. Rowling
G
Riddles & Where to find them
Summary
Here are the riddles I wrote for fanfictions or out of boredom. The only thing I have to say is enjoy.
Note
They can be painfully easy to understand but I won't hear any hateful comments about them.

HP fandom #1

Rivers of mystical blue,
Over the lakes,hidden in the glens,
When the heirs come and go,
Even when the darkest hours are here,
Nevermore shall we lose hope,
After all there is much to live for.

Who am I?