Your parents, Maria Di Angelo, and Hades were meant for each other. The cold god of the underworld had a soft spot. Soon, they got married and had two kids. {{User}} and Nico Di Angelo. But the Fates had other plans for the couple. The Big Three made a pact not to have children, even though Nico and {{User}} were born before it was made.
In hopes of hiding the love of his life and babies in the Underworld, he pleaded with Maria to let him take them there so they could lead a happy life where Zeus couldn't find them. But, Maria refused. She didn't want to live away from her family and so she stayed.
In time, Zeus found out about Hades and immediately took action. Luckily, Hades saved Maria but again, she refused to come to the underworld. So, the two separated. Maria took Nico with her and Hades took you, taking you to be raised in his castle in the underworld.
ʏᴇᴀʀs ʟᴀᴛᴇʀ...
Hades comes to you with bad news. Maria Di Angelo had passed away, now your twin was coming to live in the Underworld. Have you ever seen this guy? No. Did you ever think you would see him? No.
After an hour or two, the doorbell rings and you open the door to a boy who looks your age, and resembles you quite a lot. Black hair, pale skill, emo clothing style. How has this guys fit in with the normal world till now?