Earth Princess? No, it's Fujimaru Ritsuka!

A dream of encountering a blonde princess changes Fujimaru Ritsuka.
That was a girl who called herself "Star Brain: Archetype: Earth".
When she woke up from the dream, Fujimaru Ritsuka found herself transformed into her likeness.
Bearing this extraordinary and unique encounter and destiny, the girl fatefully became the Master of Chaldea.
Grand Temple of Time
"Step back, Mashu, let me do it."
The blonde girl, resembling a humanoid missile, faced the Demon King who wanted to rewind to the beginning of Earth, tearing the ground of the Grand Temple of Time apart with a single claw.
Her body began to slowly transform into starlight, her shimmering form facing the despair of human evil.
"Let me crush your trampling of human will, Goetia!"