Billizabeth

Billizabeth "Bill 3" Afton is a child, engineer, and minor character in the Nest. She lives with Monika, and has a tendency to get herself into trouble by sneaking out or by building hyper-intelligent robots that look just like her.

Personality
Billizabeth is laid-back and fairly calm. She loves to lounge around and just hang out, enjoying life like every child should. She loves to play, even if she never really shows very much excitement. She never shows much emotion at all, in fact, instead choosing to keep them all contained within her. Still, she's a sweet little girl that, while a little rebellious, has a lot of love to go around.

Bill 2
Billizabeth was the daughter of the lazy Bill 2, who lost custody of the girl in a divorce and never really intended to take care of her in the first place. Billizabeth represses some strong feelings about her father, acting out conversations she overheard with her Narbie Dolls.

Monika
Billizabeth loves her Auntie Monika very much. The schoolgirl brought Billizabeth off the street and raised her with more care and kindness than she had ever seen before. They have a supportive relationship, and Monika raises the girl in a way that ensures she'll grow up to be a very wise young woman, as if she isn't already one.

Robots
Billizabeth inherited the engineering skills of her grandfather. Out of spare parts, she built a "Life-sized Realistic Billizabeth Robot", who then in turn build a "Life-sized Realistic Life-sized Realistic Billizabeth Robot Robot". The triplets played switch-a-roo for a while before it was revealed that the robots had been working for Beto O'Rourke the whole time. The robots now sit deactivated in a wardrobe, wanting to get out and cause trouble whenever they can.