[@Akayaofthemoon]

[hider=Mild spoilers for 'It Could've Been Great']

Gems are said to have their weights automatically adjust to whatever field of gravity is being forced on them. Instead of being abnormally light, perhaps Eve's unable to control her own, just as she is unable to shapeshift. Another one of her shortcomings or dysfunctions, I suppose.
Think this is okay to go with?
[s]It's also hilarious to think Eve would literally just float about on the moon, no levitation necessary. She'd enjoy it for sure.

This would also be something she could share with Reggie that the other gems couldn't. Reggie and Eve can be Moon Siblings and the rest of Dork Squad becomes Awesomni-Er, Jet.[/s]
[/hider]