You may recall in "The Son of Neptune" (by Rick Riordan), Nico told Hazel that Bianca had chosen to be reborn into a new life. Well, I thought "I can turn that into a story!" So here it is. Enjoy!
Bianca stood nervously at the banks of the River Lethe. This was it. Her former life would disappear, her memories gone. What was she thinking? She couldn't desert her family! (By that, she meant Nico. Hades didn't count.) Even if she was dead, she could still talk to Nico. But if she went into the black water, all would be lost forever. Bianca turned away from it and sighed.
"I can't do it!" she complained to the Fates who had accompanied her. The oldest one stared at her and spoke in her raspy voice.
"You chose this, Bianca. It was your decision, not ours. We are the Fates, and this is your fate. You were right to choose this way. You died too soon. Your father agrees; you deserve a second chance at life. Go on."
Bianca still couldn't make herself do it. "But Nico-"
"He'll be fine, child. Your brother has found friends. He'll understand, and if he doesn't, they'll make him. Nico is a stubborn boy, but strong. He can make it without you. The Hunters will remember you. Your memory will not fade from anyone but yourself."
"I still can't-"
All three Fates hissed at her. "Go!" They tossed something into the current that glowed and swirled around in the water. A blue thread. Her life string, chopped short. It pulled to her, drawing her into the dark river, drowning her.
Bianca realized that she couldn't change her fate. She accepted the tug of her lifeline, dragging her slowly back to the world of the living. As her feet stepped into the River Lethe, she immediately felt her mind dissolving, disappearing. With her last thought, she called to the three old woman on the shore,
"Please! At least tell... tell Nico that... I love him... whatever happens..." her voice trailed off to a whisper as she collapsed into the waters that would give her an end to her old life, but an unexpected beginning to the new.
The last sounds she heard were the rushing of the Lethe, the happy shouts of Elysium that were not hers anymore, and the laughing of the three Fates as the weaving of her new life began.
Sorry if that's a little short... I was trying for a Riordan-style cliffhanger. :) More is coming, but I still need ideas. Comment or leave a review or whatever, and tell me your thoughts please. (I will give you the credit for your ideas in my story if you want it.) Thanks!