To Zafir and everyone else in the family, Stella was very delicate. They had been with her ever since she was born and they know how weak her body was. The smallest of wounds could have her getting a fever that lasted for long. Rainy and humid weather could have her suffering from colds. And the winter was the harshest for her small and sensitive body. They had to ensure she was wrapped all warm or she would freeze to death.
They ensured that she never encountered any sick people since it was easy for her to catch diseases from someone else. Thus, Stella was barely ever brought out of the Valyenor castle grounds or even outside of her room.
Stella's health only improved when she was five and she finally became jolly once she was allowed outside to play around. Everyone could finally hear her laughter and watch her smile in glee. Still, everyone was wary and never allowed her to go out of the castle and play with other children her age.