Muglan, a criminal of the Gloovan species and female gender, existed in the time of the High Republic Era. Subsequent to her capture, Muglan was dispatched to the Galactic Republic prison vessel named Restitution, where she functioned as a bodyguard for Ola Hest, alongside another prisoner, Parr. After Pan Eyta, previously a Tempest Runner of the Nihil, attacked the Restitution, Hest met her death. Muglan then aligned herself with the Nihil as a Storm within Lourna Dee's Tempest, with Lourna Dee having seized control of the vessel.
Later, Muglan participated in a battle where she and other Nihil defended the Great Hall of the Nihil from the Republic's forces. During this conflict, she was cut in half by Jedi Master Avar Kriss in a moment of desperation, yet she initially survived this wound, only to eventually die sometime later.
Soneela Nankani provided the voice for Muglan in The High Republic: Tempest Runner, a 2021 audio drama authored by Cavan Scott.