Seekers are invading souls who are assigned to track the remaining "wild" humans (on other planets they go after the respective planet's indiginous sentient inhabitants). They have apparently taken over the human police's former equipment. It was Seekers who captured Melanie after receiving a tip-off. Wanderer, herself is later pursued by a Seeker when she is suspected to be helping the "insurgents". Seekers are typically the only souls that will lie or fight a human.