Anna-Kat Otto is The Third and youngest Child and second daughter of Katie and Greg and the younger sister of Oliver and Taylor. She is 9 years old and is played by Julia Butters. She has OCD which leads to her to washing her hands a lot. She has difficulties making friends.
- She has Obsessive Compulsive Disorder (OCD).
- She has a fear of natural disasters.
- She is Katie's favorite child.
- She enjoys playing with her ponies.