Mana is the most popular (and most beautiful) guy in school. He meets Yuiko when they accidentally run in to each other and gets blood on his shirt from Yuiko's chapped lips. Mana has a wide interest in hair and cosmetics due to the fact his family runs a home beauty salon. He has golden blonde hair and green eyes which almost mistakes him to be a foreigner.
One of the "three fools". He may act like a child and eat a lot, but he's an expert with a spear.
She is a short, sporty and athletic girl who can beat anyone at sports. Although she generally does not have desires, when she finds a goal, she is able to single-mindely pursue it. Although she is generally a calm person, she has nyctophobia. She is very innocent, often being stopped by her friends from undressing in public in front of boys. She is a tomboy and refers to herself in a very masculine way as she uses the male-singular pronoun "boku" to refer to herself and always dresses in boys clothing except during the epilogue of the anime. Her number on the class list is 17. (Source: Wikipedia)
A flying pirate who is tough on the exterior, but very soft on the inside. When he was kidnapping kindergarten girls from a passenger ship, he decided to kidnap all of them because he didn't think it'd be nice for them to be separated from their friends. When Fio reprimanded him for dishonouring flying pirates, he quickly bowed his head in shame. He doesn't like Porco Rosso because Porco Rosso always gets in his way. However, when Fio told him to stop bothering Porco Rosso, he listened. http://www.wingsee.com/ghibli/porcorosso/characters.html
Haruko's mother-in-law who appears in episode 2.
Makoto's 17-year-old sister (currently 19). Initially she has a rather romantic look on a relationship, and her quest for true love lets her drift through a number of affairs before she finally finds happiness with her first boyfriend, Yosuke. Her experiences and introduction into the sexual world are followed throughout the series. (source: http://en.wikipedia.org/wiki/Futari_Ecchi)
The cousin and arranged fiance of Sachiko; in order that a trusted man inherit the Ogasawara company, their engagement was arranged, although Sachiko detests it and denies that he is her fiancé. (It is later revealed that Sachiko once loved him and had her feelings spurned, which resulted in her disdain.) First introduced when he is given the role of the prince in Cinderella: the joint play put on by the Hanadera school and Lillian Jogakuen. He has prestige in the Hanadera school since he is president of the Student Council there. However, by the time Sachiko reaches her third year, Suguru has already graduated. He is gay, and has a crush on Yumi's younger brother, Yuuki. He is often seen in the company of Yuuki, taking him along on trips and gatherings, doting on him much in the way that Sachiko dotes on Yumi. He is very arrogant, and is especially disliked by Satou Sei, as both are often at loggerheads whenever they meet, bickering or making snide comments at one another. It appears that they both know of each other's sexuality. Despite his coldness, Suguru does care deeply for Sachiko, going so far as to tell her that when they are married, she can have lovers on the outside since he will only be her husband in name only. Sachiko however finds this offensive, and comes to hate him for it, thinking him selfish. He tries to aggravate his younger cousin so that she will be more open and truthful about her feelings, rather than burying them inside. He has taken a great liking to Yumi and notes that the younger girl has had a very profound effect on his cousin.