Querl Dox, also known as Brainiac 5, is one of the main characters of Supergirl. He is a Coluan, the mentor turned lover interest and eventual boyfriend of Nia Nal, and a former member of the Legion. He decided to stay in the past and become a member of the Superfriends led by Kara Danvers/Supergirl.
Telepathy immunity: The ring has been shown to give the wearer the ability to resist telepathic abilities such as when M'yrnn J'onzz loses control in the D.E.O. and cause everyone to display violence towards each other.
Oxygen independence: Querl's ring grants him the power to breathe unaided in harsh environments such as the vacuum of space.
Abilities via Telepathic Crown: During his time in the Legion, Querl used a Telepathic Crown which grants him powers he normally doesn't have.
