All the strange Gods
Beliefs are exactly what they sound like: they reflect the principles that your character holds. They will in a way align or dictate your character’s goals according to the story. But make it as concise as possible, while steering away from very general answers like “Christian” or “Good”.
Do keep in mind tho’, that these characters are living in the 20s, a very ideologically charged era with fear of anarchism and Bolshevism, of very recently questioned Christian mores, and with deeply ingrained racism, xenophobia, and colonialism.