thx for the chapter i also think it would be great if he and bella joined astrea familia they are a good familia and it seems to me that arthur is slowly making their connection stronger
he could go to Athena's city for a year or 2 before cannon start mainly to gain more knowledge about this world maybe he could prevent Artemis dying to the Antares
Good development, as getting to know the Main Character's point of view a little bit of advice, add interaction between Astrea Familia members according to their point of view.