The character you're referring to, "Angel Heart," seems to be a part of this trend, possibly from a specific anime or video series. While I couldn't find specific information on the file you mentioned, it's clear that the themes of heroines, brainwashing, and space agents have captured the imagination of audiences worldwide.
The foundation of this genre lies in the mainstream popularity of live-action superhero shows. In these children's programs, heroines often battle monsters and evil organizations. A standard trope in these shows involves the heroine being captured or placed in a cliffhanger situation before eventually escaping and triumphing. The character you're referring to, "Angel Heart," seems
A heroine who is brainwashed or mind-controlled may struggle with her sense of self, leading to a deeper exploration of what it means to be autonomous and the value of individual freedom. In these children's programs, heroines often battle monsters