If the Dragonborn casts any spell in his presence, he will force a conversation. He will ask to be made invisible, but no matter what choice is picked, he cannot be made invisible. He will stop talking to the Dragonborn afterwards.
Haming is the first child the Dragonborn sees in Skyrim, as he is seen in Helgen while they are entering Helgen in the carriage. His father tells him to get inside his house. After that, when Alduin appears, Haming can be seen again, looking at his wounded father. Hadvar then says to him to get out of there and get cover.
If the Dragonborn attacks him, he will pull out an Iron Dagger but sprint away.
He is 11 years old.
He is the only child known to have survived Helgen.