Demi-Na was an Echidna in the unaltered Light Mobius universe. She and Mace were thought to be in a relationship by Julie-Su, though Mace explained at Lara-Su's Unveiling they were just friends and nothing more, possibly to hide the truth, at which point Julie-Su voiced her disappointment as she "rather liked her". (StH: #132)
- Demi-Na was never shown and was only mentioned in dialogue once, though it is possible that the female pictured in the background during the conversation mentioning her might have been the character.
- It is unknown whether she exists in the altered future or was erased from the alterations made by King Sonic.
- This name may be a pun on the word "demeanor" which means "outward behavior or bearing". It could be her personality.