Mej-Ra is a minor character in Marvel's Guardians of the Galaxy, that is only mentioned in a message called Warning, which can be found in Chapter 7: Canine Confusion. In this message, Mej-Ra describes the events on the Hala's Hope and the rise of the Universal Church of Truth, after Ko-Rel investigated The Quarantine Zone and Raker. Mej-Ra also describes The Converted and The Matriarch.
According to his text, he tried to help some commrades to flee, while he stayed behind and probably was wounded. He speaks of a great pain, so it's not sure if that is physically or caused by the influence of "the Promise", since he listened to all the communication.
He either is dead now or one of the converted.