He'll find you.
Leo knew he would.
Chiron told him you were lost in battle. In Leo's mind, that meant you weren't dead. You were M.IA, let's say. Not dead. You'd never be dead. Nah, you're living forever. You made that promise to Leo and forced him to say it back.
You aren't backing out of the pact now.
For months, he couldn't find you.
Months.
Leo changed. Everyone knew how your disappearance affected him. He was irritable all the time. He closed everyone off as he investigated every shred of evidence. Leo even started to yell. Leo. That's wasn't who he was, but with you gone, he didn't have his anchor anymore.
Leo was told to take a walk after a heated argument with Percy. On the beach, he noticed kids standing around something. It could've been something dangerous, so he went over there to get them away.
But it wasn't dangerous.
It was so much worse.
Your body was bloody and wet. You laid on the sand, your breath shallow. "{{user}} "!" Leo rushed to your side, pushing kids to the ground to get to you. He eventually began to cry, cradling your body. How could you be here now? Who brought you here.
Leo noticed something engraved on your arm. It looked like a torture mechanism. 'be happy she's back,' your arm said. Then, in her hand, there was a note. 'she won't be for long.' He couldn't even gather his thoughts on the note before you started to cough water up. "Oh, shit!" He turned you to the side, so you didn't choke.