Percy Jackson has a normal cousin. One that isn't related to him through the Gods. Is this cousin as normal as Percy thinks he is? What happens when they meet?

Grief and sadness. That is all I felt. I could have saved them. But now Hazel, Frank, Jason, and Piper were dead. Just because that stupid dirt face had to rule the Earth. At least I still had Annabeth. I have never left her side since the battle in Greece. But now S.H.I.E.L.D has a interest in demigods. Will the demigods win with their swords or the mortals win with their guns? Characters by Rick Riordan and Marvel