Here's my pitch.
Act 1:
Reyna Diaz as a child escaping the Mount Kadar facility with her father. Sneaking between glowing green tubes of monsters with her father to make it out. She uses her telekinetic link to the locust at the end of the act to make it out and save her father's life.
Act 2:
Reyna as a young woman in hiding from the COG with her father. The events of E-day happen and Ukkon kills her father. Reyna is captured and Ukkon take the amulet that is in Gears 4 and 5. Ukkon knows who Reyna is but has no instructions about what to do with her. He gives her father a mortal blow and takes the amulet at this point. Her father tells some background about the amulet as he dies. Reyna is captured and has to escape Ukkon's 'house of horrors' in this act.
Act 3:
Reyna starts constantly having flashes of her link to the locust that are emerging everywhere from holes in the ground. She is on the run in ruined streets and broken buildings. At one point a locust is hunting her through a dark street about to kill her when she somehow links and takes it over and has it kill some of the others hunting her, allowing her to escape. This section of the game is her as a young woman trying to come to terms with what is happening to her now that the emergence of the locust is making her head go crazy and making her see crazy things. The act ends with a strange but familiar voice in her head. A commanding voices that seems to be telling the locust where to go and what to do. She speaks "to the precious little girl whose amulet I've taken."
Act 4:
Queen Myrrah starts to communicate with Reyna even more directly since she is out in the world again and can feel her presence. Myrrah believed Reyna to be dead and that is what started all of this in the first place. But Reyna doesn't know this and Myrrah appears to be 'hunting' her. In fact, she is trying to locate and communicate with her daughter. To bring her into the fold. Reyna continues to fight and kill locust as an untrained civilian. Fumbling through dark alleys and broken rubble just to survive. The link can be used as a mechanic to control locust to escape at times. It seems like she should be dead multiple times over but the truth is the locust aren't actually trying to kill her but find her. The more she uses the link the more Myrrah can communicate. Myrrah tries to explain through the bond she shares, much like what we see in Gears 5 with Reyna and Kait. We get more understanding of the locust medallion through Myrrah telepathically talking with Reyna. Reyna never believing that Myrrah isn't trying to hurt her.
Act 5:
The last act is Ukkon hunting for her directly. Myrrah is fucking pissed that Ukkon killed her baby daddy and let her daughter escape so it is on him to get her back. Ukkon is a mad scientist so this act sees some crazy ass locust horror that we have never seen before chasing her down like X or Nemesis from Resident Evils. Inevitably she DOES get captured again and placed in a torture pod. This is where Gabe Diaz finds her in Gears Tactics which leads to the woman we all know and love Kait Diaz. The scene of Reyna's rescue happens in higher fidelity to close out the game.