The soul of the dragon (Doragon no tamashii)

DNT is my personal manga project. I wouldn't like to reveal details of it on the web, but I'm going to publish the pages of the portfolio without text.
" Dragons are real, only a certain tribe is able to make bound with them. Other people call them "Dragon Riders". When turning 8, children have to go through an initiation, where they will find the egg of their lifetime dragon companion and make it hatch. One little girl was not lucky and never came back with a hatchling, only debris of an eggshell in her hands. Due to this peculiar incident, Hana got outcasted and bullied. Why is she different from the other riders? "