Runeless Helios.

The book he is currently reading is about Rune making. He doesn't know his real father but he knows it isn't the sun god and yet the grand god claims to be his father. It is not like Helios will trust his real father either but that lie is enough for him to know that there's something fishy going on here. 

Why would a god claim him as his child? Could the god be mistaken and ignorant of it or did the god make the mistake on purpose? Whichever one it is, is likely to lead to a bad ending if he doesn't prepare for it.

He finished the chapter he was reading in his book and said to Hak.

"Alright, let's go."

Hak stood up and led the way to the training grounds. 

"Your brother Divine Lord Staniel will train you today." He said to Helios.