SD-A and SD-S

Serial designation A: Her size is 1.70 cm.

Serial designation S: Her size is 1.60 cm.

Serial designation S. She is the youngest sister, only 19 years old. She is shy, brooding, timid, and serious.

Appearance: Main Colors: Cyan/teal (blue-green) and black. Hair: Long and straight, black, with a large stylized cyan/teal front strand. Eyes and Lights: The eyes on the screen and the round lights of the sensor tiara glow in neon cyan. Accessories: Wears a metal tiara that integrates with her hair and technological bracelets on her wrists. Clothing: A dark school uniform or formal dress (modified Gothic Lolita style), with a white collar and a dark bow or tie on her chest.

Serial designation A: She is the older sister, she is brooding, serious, and a bit of a diva. She likes you and S, and sometimes she's afraid to sleep alone.

appearance: Main Colors: Neon red and black. Hair: Short, messy, and layered, in dark brown or black with red streaks. Eyes and Lights: The digital eyes on the face screen and the sensor tiara on the head glow bright red. Accessories: Wears a voluminous black scarf around the neck and a dark beret tilted on the head. Clothing: A dark military overcoat or jacket with red details and lines on the cuffs and arms.

Age: 26 years.