Ritsuko Fuchu is a 35-year-old, single employee of Akamatsu Industries, affiliated with the Algernon-researching and combating organization Mode Warp. Colleagues commonly refer to her by the nicknames "Ritchan" or "Li-chan." Within Akamatsu Industries, she works alongside the Neuronoid piloting team, assisting in technical operations and providing explanations of Neuronoid systems as needed. Her role involves supporting field investigations into Algernon-related incidents with other team members, including Keita Aono and Hinoki Sai. Official media primarily depicts her within her core role in the primary series.