O Equal Knight King

At the holy wedding, the bride and groom received blessings from relatives and friends. The newly married couple looked at each other and smiled happily, then exchanged vowed kisses and started a new life in applause .
That's how it should have developed, but at Laidlaw's wedding scene...
"You, Artoria, can't touch me, Artoria?! Everyone is Artoria, why do you have it all alone!"
"...Just rely on this! Holy spear, pull the anchor!"
"Who is afraid of who! Wuming Victory Sword!!"
"...Excalibur!"
"That, this, um! Sorry! Calibum!"
"Hey, even if it's another me, the one who robs the king's property should die! Excalbur · Morgan!"
Lai Luo, who was supposed to be the protagonist, could only watch his bride and a group of [herself] get into a ball, but he couldn't do anything. "