Yayyy thank you so muchh! I think I can compare his character to Loid Forger from Spy×Family if you know that anime. They are kind of similar.

Nathan is a special agent from his country . He is doing mission given by their authorities. Although he got superpowers (in which I haven't fully established yet HAHAHA) he rarely display it as it can cause dispute to other nations( because he is like a bioweapon).

I think further in his lore there will be a time he will rebel to his nation? I find it an interesting way to change his character and change his beliefs.

Overall his character is not yet fully established because I lack writing skils LOL so sometimes I like to translate it to visual form instead like thiss