I finally designed the Allied Capitals xD
Ottawa: A shy boy who always talk in a whisper voice but more louder than Canada. He usually seen wearing a scarf (because of being the 7th coldest city in the world). Capital of Canada
London: A British Gentleman, though he is sharp-tongued and prone to rough speech. He dislikes noises. It is said that he can see England's magical friends and usually seen being a Food Critic of England, making him having a strong gut.
Washington D.C.: A foolish, leader-type boy. He likes scientific movies, so he is very happy knowing Tony, America's alien friend. Always act like a leader in meetings but ends up fighting with London. W.D.C. has a playful look on his face but hee is serious when he needs to.
Paris:A capital with an unknown gender, Paris don't talk much and sometimes express with body motion (Mime artists references) but he/she is a romantic-type, being known as the City of Love.
Moscow: A loveable, cute, childish boy. He's shy and unsociable around people he doesn't consider friends. He is cruel to people who rejects his offer as a friend.
Beijing: A girl who looks the youngest among her friends but in fact, she's the oldest of them all, though she failed to be treated as one.