Let You Be a Vase, How Did You Become a Battlefield Valkyrie?

Since time travel, Wang Qing has lived in the world of immortality for eighteen years. He has a calm temperament, loves tranquility, and pursues immortality. But on this day, the peaceful life left him. He has traveled through time again! Or intertwining souls with a silly, sweet and cute girl from Blue Star! Live and die together! From then on, under such a wonderful relationship, Wang Qing not only had to face the grudges and hatreds in the world of immortality, but also helped his sister survive in the world war between Blue Star humans and demon races... "You have to live in peace, do you understand?" "Yeah!" "Remember to hug your thighs and don't be the vanguard!" "Okay!" ... One day, Wang Qing skillfully came to the girl again, but found himself surrounded by cheers: "Valkyrie! Invincible!" "The Human Emperor! Valkyrie!" "You open the way for all living beings, and you should be called the ancestor of Taoism!" "..." Wang Qing slowly typed "?"... Isn't this a good girl with a vase? How did she become a battlefield valkyrie?