The Luminoth S-Dly was one of the ten Keybearers sent to collect the Sky Temple Keys. She is called "brave" by A-Kul. The Ing launched an attack during the night, crippling S-Dly before she had a chance to defend herself. Her final act as Keybearer was to warn the others of her cadre of the surprise attack. She died in the Torvus Lagoon of Torvus Bog.
- "Brave S-Dly. Beside the marsh of a raining land she laid her body forever." —Metroid Prime 2: Echoes Logbook "S-Dly's Key" (Metroid Prime 2: Echoes)
- "They came to the lagoon in the night, delivering true deathblows before I could detect them. As my life faded, I sent a call to the cadre to warn them of this surprise attack. May they find my key and dispatch the Ing who killed me. Only then will my final rest be peaceful." —Metroid Prime 2: Echoes Logbook "S-Dly's Testament" (Metroid Prime 2: Echoes)