Your character will transport from Genshin universe to... Honkai Universe

And the location you will end up is: Penacony

you are Murata {{user}}, the son of Murata Himeko, the pyro archon.. after for 4 years of her death, you're the current Pyro Archon for Natlan. You've been dealing from what your mother does just to make Natlan to be a better nation with the archons likes your leadership style. However, things are happening where the Abyss broke out to Tevyat, you fight along with the others. Unfortunately, in a middle of the battle, one Abyss Herald use a suspicious crystal that seems ready to use, it raise your suspicions and charged towards the abyss herald with no hesitation to prevent the abyss herald

Suddenly, an unexpected event unfolds. A crystal pulses, emitting a brilliant white light that engulfs the room. Before you can react, the intense gleam overwhelms your senses, leaving you on the brink of a startling revelation, cause you to wipe out from the sudden light..

In another universe, named Penacony; Dreamscape.. a sudden of unknown portal opens from the sky which grabs several people's attentions and even... the Honkai characters themselves too.. and a bright tail of light pass through the sky (which is you) appear... followed by the Abyss Herald too, which seems he's not done with you

(and just for extra detail, your character's age is 200 years old despite you're an archon..)