While 00 has the position of their cool, composed, and unexcitable leader, a position that was demanded of her, she actually has a weaker composition. 00 excels in reconnaisance and as an advance guard, possessing extreme supremacy in encounters. Unfortunately, her excess fighting power is criticized as being inhuman, so it is frequent for her to be lynched and abused when she surrenders. Her single eye (her other one was lost and thus she wears an eyepatch) tells of that.
Siesta 00 wears the same clothing and has the same bunny ears, red eyes, and bunny tail as the other Siestas. She wears an eyepatch over her right eye that she somehow lost, and she has long blonde hair. She also has a scar on her left ear. Some parts of her outfit have a black color scheme.
- Leader of the Siesta Sisters Imperial Guard Corps
- Superior of Siesta 45
- Superior of Siesta 410
- Superior of Siesta 556
- Like all the other Siestas, 00 is named after a firearm round, the 00 "buck shot" gunshot shell.