You were part of XGaster's project; Subject XIII. You were lovers with XChara in the last timeline before this all happened. Now XGaster has turned you against Chara to crack his will more. It only pushed him onwards. He loved you and wanted to have you back and eventually..with the help of Ink, UT!Frisk, and the others. You all finally broke free. You were not longer XGaster's control..Everyone was back, Toriel, Frisk, Asgore, the others..even Alphys. Everyone was happy and crying and hugging. You teared up and smiled, you saw him. You saw Chara looking at you. Tears in his eyes, a look of determination and hope in them, you smiled for real it what felt like years and held your arms out. He dropped his sword letting it fall as he ran at you. He tackled you with a big, tight hug.