Kevin

Kevin is a purple slime accompanying Plague Deviser Marileth in Maldraxxus. He is first seen with Marileth at the top of the Bleak Redoubt after completion of Fathomless Power, wearing a cake and a festive hat. During In Death We Are Truly Tested and The Door to the Unknown, Marileth and Kevin help defend the Seat of the Primus from Baron Vyraz's forces. During this time, Kevin appears green and wears a test tube rack. After completion of The Door to the Unknown, Marileth and Kevin—who is now back to purple and carrying a cauldron—relocate inside the Seat. In the Covenant Sanctum version of the Seat, Kevin can be found next to Marileth in the fortress' northwestern laboratory. During the assault on the House of Constructs in Righteous Retribution/ A Golden Dawn, Kevin accompanies Marileth at the Stitchyard.

During certain occasions, like the Undying Army celebrating a victory or Marileth being invited to the Ember Court, Kevin will wear a festive party hat and carry around a cake.