Elden Ring PC | Demi-Human Queen miniboss on NG and getting to her from Church of Pilgrimage

How to get to her from the Church of Pilgrimage site of grace. The item next to her on the corpse is an Arteria Leaf.

Drops:
1,013 runes
Demi-Human Queen's Staff
Crystal Burst

Demi-Human Queen
"Demi-Human Queen is a non-respawning Humanoid Enemy in Elden Ring. She is much larger than the demi-humans that follow her. She wields a staff to cast sorceries and smash her opponents."
https://eldenring.wiki.fextralife.com/Demi-Human+Queen

Demi-Human Queen's Staff
"Demi-Human Queen's Staff is a basic Glintstone Staff in Elden Ring. The Demi-Human Queen's Staff scales primarily with Strength and Intelligence and is a potent Weapon for glintstone Sorceries."
https://eldenring.wiki.fextralife.com/Demi-Human+Queen's+Staff

Crystal Burst
"Crystal Burst is a Sorcery in Elden Ring. Crystal Burst spell creates and fires a burst of projectiles."
https://eldenring.wiki.fextralife.com/Crystal+Burst