[@Shadow Dragon] I'll help a lot trust me , heres a link that shows some Norse gods and their children's powers it's at the very end then it you want someone different from that selection then just make powers based off that god and just make them like what would be the powers of the demigod in the Percy Jackson universe as Magnus Chase is also in that universe 
[url]https://riordan.fandom.com/wiki/Demigod_Abilities[/url] here's the link the norse ones are the furthest down