Sei's older sister whom Sei greatly respects. Kotaro commented that both Sei and her do not like to talk much. The Princess has lived for a very long time and is also a descendant of the chaotic bloodline. She resides in the Sacred Precinct with Crow, where Jiro and Kotaro previously stayed at. She was sad to see him go, so Kotaro consoled her by saying he will write to her when he reaches the Special Zone. Despite her quiet demeanor, she apparently has a short temper and while she enjoys Kotaro's company, if Kotaro does something that angers her, the Dark Princess does not hesitate to hurt him. Her powers are great enough to warp and change the very weather surrounding her. -wikipedia
The President born in 1964 and no one in the show knows how this man got elected. The President of Everything is a stout bald man who apparently runs the country Milk lives in (referred to only as "our nation", a subtle reference to the Japanese habit of referring to their country as such instead of using the proper names "Nihon" or "Nippon"). He assigns missions to Milk, but whether she takes them or not is her prerogative. The President proves to be inept and incapable at fulfilling his job, at one point firing his country's best missile on his own country at his own conclusion that his citizens would try to put him in the gullotine or the electric chair. He has short, round arms and he pounds on his desk when talking on the phone. The President likes wine, women, and song but he usually enjoys cheap wine, loose women, and off-key karaoke. He also attracts flies.
The Will of the Whole Misaka Network, abbreviated as the The Whole (�体 S�tai) in the original text, is a character introduced in Shinyaku Toaru Majutsu no Index. She is a single organic system, a thought entity, created from the gathering and consciousness and egos of 20,001 Sisters. A non-corporeal character, she possess other Sisters in order to give out timely advice to the protagonists in times of need. (Source: Toaru Majutsu no Index Wiki)
Elaine is King's sister, and the Guardian Saint of the Fountain of Youth. She has long and thin eyelashes, and cut hair that reaches her neck. She wears a single white one-piece dress which is tied together with a butterfly knot at the back. Elaine is shown to be a kind, caring and forgiving girl.