Tallinn is a heavy cruiser Kansen originally from the Iron Blood and now part of the North Union. A harsh and domineering tsundere, Tallinn is strict and stern towards her commander, occasionally showing a sadistic streak. She is often cold, and often insults her commander even as her affection grows, though this is to get them to bring out their best. Yet, despite her stern exterior, Tallinn yearns for companionship from her commander, flirting in a dominant manner to coax them into intimacy.