Both Garie and Sabi are very hyperactive children, which makes them different from their serious mother and other sisters, including Sucy. This is possibly because they're still very young and immature.
Mrs. Manbavaran is shown to be very strict towards Garie and Sabi, demanding proper behavior from both of them, even though they're still very young. Garie and Sabi, however, don't seem to care about what their mother wants, instead continuing to do whatever they want to. However, they are subject to her will when their mother gets angry with them.
Garie and Sabi seem to have some appreciation for their older sister, although the latter considers them a nuisance. As with their mother, both are terrified when Sucy gets angry.
- Unlike most of the Manbavaran family, who possess natural immunity to most toxins, Sabi and Garie aren't immune to poison due to their age.