Dashi Dog is the crew's sweet IT officer. She is one of the only females on the Octonauts crew. She is voiced by Teresa Gallagher in the UK and Mary Murphy in the US.

Dashi is a Dachshund who controls all of the computers, communication devices, and steering for the Octopod. She's also the crew's official photographer, taking pictures of the different creatures the Octonauts meet. Dashi normally stays on the Octopod to coordinate missions on an advisory capacity, but she has joined in on a number of missions before and has even done a solo that involved taking photos of reef life. She has an Australian accent in the original UK version, but not in the US version.

Normally, Dashi is seen in her seat up in the HQ next to crew mate Shellington, whom she has done a few missions with before. She's also usually seen in her room on the Octopod, where the decor of it reveals her as being very feminine. The walls are pink and she's normally seen either messing with her favorite camera, or sitting at her vanity. She sleeps with pink headphones listening to music as seen in The Octonauts and the Elephant Seal and The Octonauts and The Crab and Urchin.