User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-6064271-20130725011339/@comment-3146930-20130725095534

Even if Hazel didn't physically age, she does mention that because she is a child of Pluto, she didn't lose her memory. That means that Hazel is older then her body suggests. Her story is also a natural starting point as she was born before anyone else.