Leyte Jokin

Leyte Jokin is the chief engineer of Team Dai-Gurren and Leeron's direct subordinate. She is a skilled and ingenious mechanic, an ideal work partner for the naturally gifted Leeron. Her central duties revolve around maintaining Dai-Gurren's spiral engine, which appears less technologically sophisticated in Fortress-class Gunmen thus requiring additional fuel beyond spiral power. Her personal trademarks are her lab coat and a cigarette she holds in her mouth. Souce: Gurren Lagann Wikia