Abyss would be the only one I think she couldn’t defeat, as long as Abyss isn’t being controlled by someone else or blinded by rage while not restraining themselves. That being said they are also on a god tier. Midnight is technically a god and creator of many realities but often restrains themselves in battle and is slowly losing their powers. Elementus and Hellfire were never used so I couldn’t tell you about them. That one I made with the really weird name and needs a name change/design change doesn’t like to fight and would probably avoid it if possible, but if forced to they could give Kira a real challenge. Nebula doesn’t care for fighting while Quantum is used to it. Both are able to stop time/reverse time while remaining completely unaffected would effectively give them a win. That’s it for gods really.
Mortals who could possibly win:
Stardust (after her Journey Through the Universe story, she had “died” during the Nuclear Dragon-Galactic Labs war and appeared on another radioactive planet. She was found by Sky, a Human, and she is now under his care for the time being. Her powers were suddenly awakened on a space station and is obtaining more abilities as time progresses).
Void and Trenchie (effectively the same, ones shy and doesn’t like to fight while the other is ready for anything, both have reality bending abilities such as being able to abuse space to their advantage)
Summer and Winter (while technically mortal, their powers affect the Stars most notably, they are known as Sun or Star Demons and their race has these same abilities, other than that, most of their powers are completely random).
I’m probably missing a few.
