Since he is starting at "Untrained", according to the Half-Blood creation guide we linked you, he is only entitled to two Magic Keyword slots and one Mundane Keyword slot at Rank 1.
There are four ranks for each of the Mundane Keywords, and anything beyond the first is earned in-game.
Currently, you have three Mundane Keywords listed here (Brawler 2, Ballistics 1, Melee 2) at the incorrect ranks, and two listed in your application (Empathy, Heightened Strength) along with one that doesn't exist (Heightened Agility). For for something similar to heightened agility, you could use Heightened Speed or Preternatural Senses.
You can find all the information on the Keywords page, but here are the links to specific sections: Magic Keywords and Mundane Keywords.
As for his cantrip, you're free to say he's not aware of his active magic use, but you must list a power for admin review.
History-wise, everything looks in order, but is the hunter group he met Exchange or an independent group? Keep in mind he's in England, so the Exchange would be a big presence for this hunter group. Either is acceptable, but it's vague enough that we can't be sure.
Thanks! Let us know if you have any further questions. Tag us in the Discord or leave a post in this thread when you've made those changes!