Stars Brigade

TRIGGER WARNING: Contains themes such as rape and killing. Not suitable for readers below the age of 15.
Stars Brigade is an organisation, created to protect the planets' dimensions from a bunch of criminals known as Sevens. Sevens are after a specific family, whose seven year old daughter is an usagimimi with wings. Her name is Alexa Blaine and she is the daughter of Arch angel Michael and Juliet, the grand daughter of Princess Kaguya. Alexa trains at Stars Brigade along with her cousin Jordan Masters, an usagimimi named Miki Tsubaki and a nekomimi named Takuto Kimura.
When they reach the age of seventeen, they become official Stars Brigade members and have their own team.
The people they encounter on their adventures give many clues about the mysterious supernova in the year 8080 that destroyed half Alta Tu, one of Jupiter's three dimensions. They also learn why Sevens are after Alexa.