If you've a state of mind, click the title and type it in below.

I am a state not solid, liquid, gas,

In which the sailors moon the lass

By given name, the ship that flies

Like lightening into darker skies

So sir, when I tea you will know the sound is key,

Again; so, wren it he!

'Solid, liquid and gas are all the states.'
'Is that so?'
'I've got it, you're a toothpaste-like sponge!'
'No.'

Riddle Answer Serenity

Riddle Explanation
I am a state not solid, liquid, gas - the state of being serene.

in which the sailors moon the lass by given name - Princess Serenity, the birth name of Sailor Moon, the protagonist and series title of one of the most popular manga and anime series worldwide.

the ship that flies like lightening into darker skies - Serenity is the name of the ship in the Firefly television series, film and comic books.

so sir, when I tea you will know the sound is key, again; so, wren it he! - Sir, when I tea, and; so, wren it he, both sound like serenity.