Slan is a member of the God Hand, and provides humans with lust. She also seems to love pain, and is very interested in Guts. Being one of the God Hand, she is worshiped by all Apostles, and also has cults following her in Midland.
Relationship with Guts
Slan wants to have sex with Guts. Not the normal kind however, as she wants cutting and pain involved as well. She approached Guts after he was done fighting Trolls, and manifested herself from the dead trolls intestines. She tempted Guts into using the Behelit that he carries and transforming into an Apostle. He refused, and killed her avatar in the human world, sending her back to the spirit world.