From Wikipedia: A genius blond-haired Akuma who recently got transferred to Tomoharu school and was put into his care from the Akuma hunt. Her family profession is to study the Asura Machina control systems. She's a Luck-eater, an Akuma that eats the luck of people and controls the balance between unlucky and lucky people. She was sent to study the Asura Machina that had absorbed the Stabilizer. She also came to Japan to look for her missing sister. After exident in 7th series she appeared in 1st Worlgв 5 years ago in the past and helped Naotaka and Ritsu in their Asura Machina research. She created Hagane and modified Kurogane for Tomo.
Birthday: January 12 Sign: Capricorn Blood Type: O Height: 153 cm Class: Freshman With a principled competitive nature and natural aptitude to excel at an exceptional range of athletic activities, Itsuki’s direct mannerisms and masculine habits would have observers brand her as the classical embodiment of a tomboy. Though capable of mastering any sport she participates, Itsuki would readily declare that soccer is the most enjoyable and rewarding. At times her dedication can be borderline obsessive, as it is not uncommon for her to spontaneously start dribbling or perform warm-up exercises to pass idle time.
Setsuna is a Shinmeiryu swordswoman from Kyoto who was taken in by Eishun Konoe, Konoka's father and the leader of the Kyoto Mage Association. She is childhood friends with Konoka and her protector. Setsuna spends the beginning of the series being relatively cold to Konoka, wishing to protect her from the shadows due to not forgiving herself for being unable to save Konoka when she almost drowned when they were kids. She does eventually open up to Konoka after the Kyoto arc and begins calling her "Oujo-sama" and "Kono-chan". Setsuna's pactio, Sica Shishikushiro is a wakizashi which she can summon and multiply at will to strike targets like missiles. Due to her training she's also skilled in anti-demon arts and is the one who taught Negi how to create shikigami from paper. Setsuna is a hanyou like Koutaro, in particular a crow. She was expelled from her people because white wings are considered a bad omen, and it was implied by Evangeline that she is an albino using hair dye and contact lenses to appear human. A running gag within the series is that Setsuna and Konoka appear to have romantic feelings for one another, yet Setsuna will deny it whenever she and Konoka are stumbled upon in romantic situations or asked about her preference.
Suika is the only oni currently living above ground in Gensokyo, with the remainder of the oni race living underground. Just as the folktales say, she has two horns on her head that symbolize her oni heritage, and enough physical strength to throw large boulders single-handedly. Her personality is jolly and quite childish as you would expect from her appearance. She also likes to drink and loves to party with all her heart. Her power in the games is to manipulate density. (Source: Touhou Wikia)
Candidate pilot. Karin is a quiet girl who seems to be distracted from reality and likes to text-message her cell phone. She is afraid of cats in general and is 15 years old. (Source: Wikipedia)
Lunar is a childhood friend and rival of Sun. She has used the powers of her mermaid voice to become a pop star idol singer. She seems to suffer from a superiority complex, and she never passes up an attempt to overshadow Sun. She initially thought that Sun was boasting Nagasumi to her, and in an attempt to outdo Sun she decides to steal him away from her by making Nagasumi her servant, since Nagasumi has also seen her mermaid form. Later she decides to live in Nagasumi's house until his servant status is over. (Source: Wikipedia)
Kai is the richest boy in Japan, the fourteen-year-old son of the head of the multi-million dollar Mikawa Corporation. He rivals Nagasumi for Sun's hand in marriage. He is a killer whale from another mermaid group. Strangely while Sun and Lunar are shown in Mermaid form (torso of a human and tail of a fish) whenever they fail to maintain their human forms, Mikawa is shown as an entire Killer Whale when he succumbs to the effect of water. He also has agoraphobia, which is why he travels only in submarines and wears an astronaut's suit in open spaces. While looking for a servant he befriends Saru. His name is related to Mikawa Bay and Neptune (海王星, kai�sei?). (wikipedia)