This witch can be summoned to help you fight the Moonlight Butterfly in Darkroot Garden. The sign to summon her is at the bottom of the tower hidden in a bush. Summoning her makes this boss trivial, and if you want a challenge is not recommended.

How do you summon witch Beatrice Four Kings?

Beatrice appears as a summon sign under the staircase leading up to the Moonlight Butterfly (only if the player has had hollowing reversed). Her summon sign is later found behind a pillar before the fog door leading to the Four Kings fight in the Abyss.

Is there a summon for 4 Kings?

The most common places for summoning signs for runs on the Four Kings are on the platforms near the Hollows at the base of the elevator leading down from Firelink Shrine into the New Londo Ruins, and near the Abyss fog gate.