Driven by her parents being conscripted into the Terra Abduction at the hands of a mysterious colony, Itsuki joined the Inter-Colony Police in lieu of the secondary education most teenagers are made to undergo. Itsuki dislikes making mistakes and places a heavy emphasis on her work as an ICP officer which forces her into things such as fighting Bougainvillea and Mintao as per the orders of the ICP administration from within the experimental Arc-II-Jl QT-ARMS.