Princess Cosmos the Cosmic Trickster
Full art:

Hairstyle:

“Spherical roll -> Massive roll <- Cosmos-style foundation"

Halo/head accessory:

“If you can see this, you have entered the Princess’ territory”

Chest parts:

“Chest parts (Big Bang + cosmos)”

Skirt details:

“Big Bang
⬇
Atoms
⬇
Stars
⬇
Galaxies
–> Big Bang Skirt”

Outfit detail:

“The further the outfit goes downwards, its presence becomes more ambiguous and it blends with the universe”

Face details:

“Shooting star-like effect -> Face paint-like effect”

Source.