Jilaka was a Locust Berserker who fought in the Siege of Madrigal. She was unleashed upon Yankee-Two and a number of other Gears by Yortuk, only to be tricked by the Gears into going out into the dark, where she was eventually torn apart by the Kryll. Even so, Jilaka succeeded in killing many of the humans and kept them occupied while Yortuk and his troops advanced to the breeding farms without delay.