My Dearest Nico,
I am about to bathe in the River Lethe for the second time in my life and feel that I should explain my decision to choose rebirth to you. I don't want to sit in elysium with the memories of my past life and all the suffering you and I experienced together and yet feel that I do not deserve to be here because I still abandoned you. I don't want to remember that I dropped my little brother in a heartbeat for the chance at immortality.
I know I haven't been anything of a big sister to you and you deserve so much better than I ever was but I love you Nico and I cannot imagine a life without you. Which is why my only regret for this new life is that you will not be there.
Nico, I know you have been searching for me and trying to find a way to bring me back but even if you could I would not belong there anymore. Please stop and live Nico, think of this as my last request for you.
All my love always,
Bianca.
P.S. By the time you read this I will have already started my new life and won't remember you so don't try to stop me
Nico read the letter again. He couldn't believe it, Bianca was choosing rebirth. She was choosing to leave him, again. He scrunched up the sheet of paper and threw it into the bin at the other end of his cabin. It doesn't matter that she decided to be reborn, she abandoned him anyway and he wouldn't be able to see her again even if she was still alive. But of course it did matter and Nico's tears betrayed him.
He cried for hours, just lying on his bunk and letting silent tears fall as he stared at the midnight black ceiling. Once he had wiped away his tears, he ran into the woods towards bunker 9. As Nico had expected, Leo Valdez was the only person in there.
"You been crying Di Angelo?" Leo asked when he looked up from his work.
Damn puffy red eyes that never go away after you've been crying. "No"
"Then why are your eyes so red?" Leo was one curious son of Hephaestus. And Nico was not going to be able to get Leo's help without answering all the questions the older teen asked.
"Fine, yes I have been crying"
Nico told him everything. How he and Bianca were from the 1930's. How his mother had been murdered by Zeus. How His father had wiped their memories. How they had been taken out of time for sixty years. How he and his sister were rescued from the manticore by Percy, Annabeth, Thalia and the Hunters of Artemis. How she had left him to join the Hunters. How she had stolen the Hades figurine for him and awoken the automation that Leo's dad had built. How Percy had come up with a plan to kill it. How Bianca had stolen that plan. How she...How she died. How he had tried to save her. And finally her choice to be reborn.
Leo was a good listener. Which surprised Nico since usually he couldn't shut up. But he listened to Nico's story without inturupting once. When it became clear to him that Nico had finnished, Leo offered to help.
Finally, Nico could ask what he needed to ask. "Could you set fire to my bin?"
Leo stared at Nico as though he was confused about how setting fire to the bin in cabin 13 would solve any of Nico's problems. After a few minutes of this Nico decded to explain.
"I don't want anything to do with my sisters decision to be reborn and the letter she wrote is in my bin. Chiron doesn't let us have any matches so the only way I can start this fire is you."
Leo reluctantly agreed to set the fire for him. And the two of them headed down to cabin 13.
Once Leo had left and Nico's bin was on fire the son of Hades sat and stared at the flames without feeling. His sister had chosen to forget him so he would choose to forget his sister.