Tweak Bunny

"There's Tweak, standing right beside me. I know this green rabbi girl likes me so much more than what you think. This engineer can help Ruby Ramirez build a lot of stuff when she's in need of inventing new things for the Grand Alliance."

--Su Ji-Hoon, The Octonauts and the Great War

Tweak Bunny is the engineer for the Octopod. It's her job to make sure that everything is shipshape below deck in the engine room and maintains all of the Octonaut vehicles. She has even invented a number of new machines for the Octonauts, along with a whole new Gup that was revealed in the Christmas Special, the Gup-X. She also invented the Gup-S in The Over Under Adventure. She as well invented the Gup-H which was seen in the The Poison Dart Frogs episode and the The Baby Sea Turtles. She invented the Gup-I which was seen in The Emperor Penguins and The Operation Deep Freeze. She is working on new gups like the Gup-O, Gup-R, Gup-G, Gup-K, Gup-M and Gup-Y. She also likes fixing and inventing things that sometimes work out in unexpected ways. She is one of the only two females on the Octonauts crew (resembling the younger one).

In When the Cold Breeze Blows Away, she serves as an engineer of the Octonauts, which is part of the Future Alliance and the Sonic Alliance. She is also part of the Preschool Girls as well, along with Dashi.