M-Dhe was one of the 10 LuminothKeybearers featured in Metroid Prime 2: Echoes. The Luminoth warrior died in the Landing Site room in the Temple Grounds of Aether, either of exhaustion, wounds received in battle, or fighting with the Ing. A-Kul refers to the Luminoth as fearless in one of her clues, but no other details are mentioned in the game.
"That last hit breached my armor. The poison spreads. Though I have found the key, it is too late for me. Soon my light will fail. They know I am here. They will come to this site to plunder the key. My last stand shall be at the edge of the Temple Grounds. I only hope I have the strength to fight when they arrive."
"Fearless M-Dhe. The one who shall move the pillar of holy ground will see your souless body."
M-Dhe cannot be scanned immediately. The room must "reload" (exited to the far end of the next room) and then be returned to before several well placed jumps can complete the scan at the start of the adventure.