Watched Diebuster after Derrick Wyatt commented on how Gurren Lagann and Diebuster were big influences on his designs, so I started making the connections. Sari definately resembles Nono from Diebuster, particularily in character design; the boots, the gloves... Sari didn't know she was Cybertronian in origin, a secret guarded by her adopted Father, a lot like Nono not knowing she was a Buster Machine and being taken care of by an similarily adopted dad. Their powers eventually revealed. Finally, Nono sacrifices herself at the end of Diebuster to prevent a black hole from starting another Big Bang...wait...Sari's gonna die!?