( Mira, 12 years after the birth of Kremeth Jr )
Arguably, for Mira, the 12 years after the birth of Kremeth Jr had been the most productive of everyone that Max held dear.
For starters she finally turned 18, which was the human standard of reaching the age of maturity, which wasn't important to Mira herself but was an important point for Max.
Every species matured at different speeds.
Even with Bipedal species like humans and vampires, 16 was considered a fair maturity age for Vampires, while it was 18 for humans.
For Barbarians it was 14 and for elves it was 22.
Regardless, for most beasts the age of maturity was 5-6 years and although dragon's were slower than others in this regard, they still reached full maturity at age 8.
This was evident in Mira's looks as her human transformation no longer looked like she was a teasing loli, but rather a mature woman just like Rhea which played a big role in how Max perceived her.