Chōkasoku

is an Arrancar technique used by Nelliel Tu Odelschwanck while in her Child Form.

Description
While not as powerful in her Child Form as she is in her Adult Form, Nelliel possesses some rudimentary skills in Arrancar abilities. She can accelerate her movements with what appears to be a basic form of Sonído. When she uses this Sonído form, her mask's eyes glow, and she accelerates through the air at speeds which surprise Ichigo Kurosaki when taken off-guard, and with enough momentum to knock him down.