Shiroko Li at first she was created by Sakura feather from her father Syaoran in the reason of to protect they're future son. After she was created, she was being trained under her father hands for her to be strong enough to protect him in the future.
After the child was born and named him Tsubasa, the families were happy including her, but things were change after they're intention grow to Tsubasa and make him strong, Shiroko felt alone and feels jealous towards Tsubasa, but as an older sister she wants to be strong and protect him.
After a few days she go meet the Dimension Witch on her own asking her how to be stronger the Witch ask her "Is that your wish?" and she nodded seriously "There is a long way ahead for you, you wish to pay the price even if it cost you?"
"I am willing to pay the price even if it cost my own life...I want to protect my families.."
"Your price is your families memories and your own, are you still willing to wish for it young lady?".
The girl went silent but she immediately agree with her "I will pay my price...no matter how tough it is".
The witch nodded before sending her to the Clow Country.
The girl was now is like an empty shell nothing she could remember even her own name, suddenly the kind hearted man Fujitaka took her home along with is other adopted child named Syaoran, as soon they arrive at they're home Fujitaka ask her name but she doesn't remember what is her own name, thinking for a minute Fujitaka though for a name and named her Shiroko.
After a few month, Shiroko just meet with the young princess in the same age with Syaoran, to her she was the most beautiful person along with her smile, by that time, she learn to smile often and be friends with her, Shiroko also made a promise to Sakura that she and Syaoran will be happy together forever, and also promised to protect her from every danger, Sakura think as Shiroko an older sister to her, both of them make a great bond together and never leave they're side.
Soon in the age of teen, Syaoran took his father place after his death for the expedition while Shiroko stays at the house, but she always pays a visit to Sakura.
In a year later Syaoran return back home, Shiroko give him a bright smile with a hug to him "Welcome home little brother~", Syaoran gives her a nod and return her smile "I'm home, Shiroko-neechan~", in a few minutes, someone knocked on the door and Syaoran goes to greets them, after opening the door princess Sakura comes in and gloomp Syaoran, both of them fall on the floor as Sakura greets Syaoran "Welcome home Syaoran-kun~".
The two young couples leaves the house for a date, while Shiroko laying on her bed sleeping alone, she was hoping that someday she will have someone special in her life, of course she was jealous seeing the other two, but she ignore the feelings and let them happy instead.
An hour past by, the sun is beginning to sunk down to the earth and the moon will show up, some tragedy will happen soon, she can feel it, it's not for awhile soon mysterious people in the shadows appears with a bat sign figure on they're shirt appears infront of her house breaking the door, she was in shock before taking her naginata and fights with the figure in shadow before rushing outside to where Syaoran should suppose to be "Syaoran!!" She knew she was to late, the princess body seems to be frozen and cold since her heart and memories is gone. Syaoran face were full of worried,
After Yukito the priest send them to the Dimension Witch, Syaoran immediately ask her how to save Sakura, Shiroko just stood up besides him couldn't do anything about it, suddenly the two other figure appears, one is a man in black, he was tall and have a black hair with him, the other one is one in white with blond hair.
Since four of them wants to travel, each person must pay a valuable price, Syaoran and Shiroko pays the same price, it was the memories of the princess, Shiroko doesn't have any effect on it, except Syaoran, he was upset with it but still willing to pay his heavy price, the blond pays a price a tattoos that was on his back and the ninja one gives his sword named Ginryuu to her.
The witch ask the boy named Watanuki to bring the Mokona's, she give them the white colored one to travel with them.
The White looking bunny creature swallowed them inside and travels within time and space.
She was thinking once more but before a ball of ice appears infront of her, blinking her eyes as the ball of ice talking with her "Someday, someone will warm up your cold and frozen heart with they're care and kindness, and you will find someone who loves you the most" an Ice bird appears infront of her before she opens her eyes
