Pristina

Pristina grew up with her brother Pierson in a world of Glaen. She has a brother complex and thus was infatuated with her brother who became the head researcher general of the military at a young age, admiring him. However he ends up dying, being killed for this endeavors and research to revive the girl named Marina, as he ended up killing and experimenting on various people to create a revival stone.

Pristina grew up wishing to go back in time and eventually became the mother of the time machine. With the help of Rylan Blackwood, a younger scientist she'd end up marrying, she used the time machine (similar to Stein's Gate phone microwave and D-mail) and able to convert her memories and thoughts into data and send them to her past self so she can alter the past and save her brother. Scientist friend Rylan, ever since they met, likes Pristina however and has troubles knowing he helps Pristina save the guy she likes.

However Pristina is the only one able to use the time machine as she is able to retain memories and keep them intact (similar to Reading Steiner). The time machine only works with a select few and thus as a creator was able to do so. But using the time machine can distort the past and change future events and timelines.

Every time she goes into the past she returns to the point where her brother Pierson is with Marina. Pristina believes to stop her brother from dying, she must prevent Marina staying with her brother and try to break up their relationship, knowing Marina would die.

So Pristina tries to prevent this, by getting help from her Scientist friend Rylan in the past (explaining scientist logic to him and etc). However Rylan and her never met in the past and thus it's a difficult task to earn his trust. However Rylan eventually helps Pristina with her goals and falls in love with her.

The (future) military lets Pristina go into the past thinking she would not abuse altering the past and become a test subject herself, on the basis she'd only alter events for their benefit, aka eliminate the mixbreeds/mudblood and prevent them from happening. (in Future timeline Mixbreed Hybrids and Purists have a war, Pristina is forced to work with the Purists as they have the tech needed to research) ((If it helps, think harry potter with pureblood wizards and mudbloods))

However the military steps in seeing the changes she made to be different than what is intended. (aka they have someone on their side who retains memories despite the change of timelines and shifting world lines like Pristina)

Basic inspirations are

• Fullmetal Alchemist Creation of the Philosopher Stone/Red Stone for Pierson's story
• Steins Gate Time Machine for Pristina's story
• overall setting is similar to Harry Potter's Purists hating Mudblood without the magic and wizards but with an appearance/design of Final Fantasy.