Fuuma Arashi appears only in the Naruto anime. He was the hope of the Fūma clan's shinobi who tried to rebuild their clan and Sasame's cousin. He and some others joined Orochimaru to gain the power to rebuild the Fūma clan. Source: http://naruto.wikia.com/wiki/Arashi
Yakumo was the heir of the Kurama clan. A savant in Genjutsu she was the pride of her clan. When her parents were killed in a fire, she was turned over to Yuuhi Kurenai to watch over. Sandaime felt Yakumo's talents were wild and could bring about disaster for Konoha. Kurenai later felt she could not properly train the young woman, so her powers were sealed away and she was sent to a mountain retreat for her own protection.
Raiga is a member of the Seven Swordsmen of the Mist along with Zabuza and Kisame. He appears only during a filler arc. He uses pikes as lightning rods (lightning is an energy source for him) and can put them together to make an even more powerful 2 bladed weapon. He travels along with a small disabled child named Ranmaru, whom is the only person he cares for.
Mother of Diana and Minnie May. Mrs. Barry has a severe personality, expecting her children to follow strict and sometimes unreasonable rules. She's quick to condemn Anne for mistakes (such as accidentally getting Diana drunk). (After the "raspberry cordial" incident, Mrs. Barry won't let Anne speak to Diana until Anne finally redeems herself by saving Minnie May.)
Minister's wife, two friends for Anne. Mrs. Allan becomes one of Anne's best friends.