Flareup is an Autobot scout, and close friend and ally of Kusanagi-no-Tsurugi. Worked as a miner of the low caste, she was rescued from such a lower classe status by Kusanagi in the early times of the war, and became the scout of the Autobots alongside Bumblebee. When she joined the Autobots, she originaly served under Kusanagi up to his disapperance, and soon served Optimus Prime and became the second scout of Team Scout.
After following Optimus to Earth, Flareup helped Optimus in locating the AllSpark, all the while fighting against the Decepticons. However, during her time on Earth, she was captured by HYDRA, where she was experimented on (similar to those of M.E.C.H. Thankfully, unbeknownst to the HYDRA scientists and operatives, a MIT graduate, Arthur Jaeger and helped in her escape. In response to his mastery expertise in hacking HYDRA tech, Arthur became his partner and one of the only civilian humans to know of cybertronian presence on Earth.