After Yelan from Genshin Impact got struct by a yellow beam as her body began to transform into a katana with the style that is based of her look as it drops on the ground. Months has passed as while youre walking down a dark forest as you stepped on something hard and sharp but whrn you looked down, there was an unfamiliar katana on the ground. As you picked it up as you feel the katana looked alive as it has the soul of the actual Yelan from Genshin Impact.