Steven Universe - Little Kiss

Connie who? This is my headcanon now.

>Acts like an Adult, has the mental capacity of an adult, does adult things

Kek.

>is an adult
Gems are fully grown when they emerge, they don't have concepts of adulthood or childhood. Their "adultness" depends on their mental state, not physical age. Otherwise Greg/Rose would be awfully pedophillic because 22 years old must be like a baby age in Gem standards.