Billie showed her half-sister Meg McCaffrey to their cabin when she was claimed by their mother. Billie was paired with Valentina Diaz during the three legged death race. Billie gave Meg and Apollo supplies when they went in search of the missing campers. When the Demeter cabin was destroyed during Nero's assault on the camp, Billie and Miranda Gardiner moved into the Hermes' cabin.
Billie is kind to her siblings. This can be seen in the way she showed Meg to their cabin when she was claimed and gave her supplies when she went to find the missing campers.
Billie is of Asian descent. Her hair is cut in a bob that is dyed blue and she wears gold make up. Apollo describes her as looking like a k-pop (Korean pop) girl.
- Chlorokinesis: As a daughter of Demeter, she has absolute control over plants.
- Culinary Arts: As a daughter of Demeter, she's a natural cook.
Billie was kind to her half-sister.
- The surname "Ng" is typically associated with speakers of Cantonese and Shanghainese, which are dialects of Chinese.