Reborn: AOT: Historia x AOT 2 MC

Just my own theory If AOT 2 MC survived after the secret cutscene of the final credits of AOT 2

After learning the death of Y/n, Historia didn't knew on how can she stop this endless storm without her lover, Ymir and Y/n are the loved ones of Historia, but when the two of them were killed Historia lossed her mind

However as time came an unknown soldier appears in front of her