The Castle ghost

This part is true:
There is a Medieval castle in my hometown, St. Olaf's castle and like every castle, it has a ghost or few.
It is said that during a siege, a maiden from the castle fell in love with the opposing sides officer. They agreed to meet, but he betrayed her and his men stormed the gates.
The castle held, though, and later an investigation found the maiden guilty of treason. As a punishment, she was buried alive in the wall. From her rowan berry-necklace sprouted a tree that had pure white blossoms and blood red berries, declaring her innocence and placing blame on her prosecutors. 
No proof of her existence nor punishment has been found. Though there was indeed a rowan tree growing from the wall, but one stormy night it fell.
Strange lights have been sighted from the hall where the lovers were supposed to meet...

B



Hundreds of years, the same loop. Meet the lady, storm the gates.
Get killed.
Get her killed.

You could hear her scream for hours.
Hours alone in the wall, screaming for her Lord Father to save her, screaming for her lover to return. One could do nothing, one was dead.

Storm the gates.
Storm
Storm
Don't storm!
Don't!
Change it.

Cut the tree
Set her free

Thunderstorm.
Storm
Cut the tree
Help me

He picked up his ghastly sword, hacked at the old rowan that bound them to their doom.
The wind tore at him and the tree alike.
A lightning split the sky open and a mighty rumble shook the grounds.

And the tree broke. It fell to the old courtyard and smashed to pieces.

From its core, she rose.
And finally, he could hold her.
Say her name out loud:
Pihla