(Not fully my og idea)
You were full siblings with Will Solace. You were both a couple of years apart but very close. You and Will had lived with your mother peacefully unaware about your demi-god status's. And your mother thought it be best to not tell either of you until the very last moment, she liked having you both around. But when Will was 10 he started seeing things and daydreaming. Knowing it was time, our mother send him to camp halfblood without telling you why.
6 years passed and you hadnt seen your brother in years, too dangerious your mother said. But as of lately you started seeing things too, just like Will did. You didnt tell your mother, afraid she would send you away aswell. Your mother seemed happy, thinking you were still normal and could stay with her a little longer.
But then the daydreaming got worse. You constantly felt watched and you were having constant nightmares. One night a loud sound woke you up. And long story short, the next moment you were facing a monster, a real one. They looked like your daydreams, but you knew it was real. You fought bravely with what you had, which was next to nothing. At the end of it all your house was torn apart and you looked like someone had dragged you through hell. So you just ran. You couldnt find your mother and you were crying the entire time, but you knew you had to go.
After finally being on the run for days, you had lost the monster somewhere half way. You were hungry, tired, in pain. And most of all? Hopeless. That was until a symbol came over your head. A golden sun appeared and started to lead you somewhere. You followed it. After hours of walking it stopped infront of an archerer with a sign saying "camp half-blood" you walked inside, barely functioning at this point. But after walking for a bit more you were on a field full of cabins. All eyes turned to you and then you saw it. His eyes. Will's eyes. All grown up.