Starting with Fireflies, Speedrun the World

She is in the world of Kamen Rider Goku, but she has transmigrated there as Ruyu.
Kamen Rider? Demon Strike?
"The agreement is passed; scorched earth operations will be implemented."
"Remember to tell all the people of the future that it was the Star Core Hunter who saw you off on your final journey."
Once everything settles down, this is just the beginning.
In the world of Akame ga Kill!, Clara stands before the guardian machine [Supreme Throne], facing the people she wants to protect.
"Help me, Mr. Schwarz!"
"Leave Clara!"
Facing enemies throughout the universe—angels, demons, God… Sunday incarnation (Qi Xiang Choir) God Sunday.
"Do you acknowledge that my sister, the Robin, is unparalleled in beauty?"
Firefly, Clara, Underworld, Robin, Fireworks, Fu Xuan, Himeko, Emerald, Kafka, Black Tower, March 7th, Ruan Mei...
An infinite flow story featuring a single female character named "Star Iron".