1+2. There isn't much to axel's backstory(for now), however they were some-what close to the mc before the whole cult thing. They worked in the same company together. Saiv choose them because of how loyal and helpful they were to him.
3. Airrow likes sweet food and sunny days are his favorite. He also enjoys coding little things here and there ^^
4. Yeah feel free to! There is also a discord server (for the games) where I am more active in!