Darkstalker Kaathe

Darkstalker Kaathe is a character in Dark Souls. He is a primordial serpent with the primary goal of bringing about the Age of Dark. He is voiced by Peter Marinker, who also voiced Kingseeker Frampt and Eingyi.

Location

 * In the Abyss, after the defeat of the Four Kings. The player must not have given Kingseeker Frampt the Lordvessel.

Plot
Darkstalker Kaathe greets the protagonist and tells his side of the story: that the player is not to renew the Age of Fire by rekindling the Kiln of the First Flame, but is in fact the descendant of one who possessed the "Dark Soul", and shall be responsible in bringing about the Age of Dark. Kaathe, rather than Frampt, will transport the player to the Kiln of the First Flame in order to place the Lordvessel, and then instructs the player to collect the other Lord Souls in order to confront Gwyn, Lord of Cinder.

Kaathe can initiate players into the Darkwraith covenant.

Frampt or Kaathe?
Placing the Lordvessel while under the care of either of the serpents will result in the loss of the other. Frampt provides the service of breaking down larger Titanite pieces and can get rid of items in exchange for souls, while Kaathe provides Cracked Red Eye Orbs to the player while a member of his Covenant. How much of an enthusiast players are for invading other people's worlds is the deciding factor.

The choice of the primordial serpent the player sides with has no effect on the ending on the story.