Hermes is a Brough Superior motorrad (a two-wheeled vehicle that cannot fly but moves in the direction it's pointed—in other words, a motorcycle) who travels around with Kino. Hermes provides the speed that allows them to go anywhere they wish. Aside from his speed and capacity for toting about large amounts of luggage (Kino never seems to travel light), Hermes doesn't really have many other qualities except for constantly mixing up quotes and complaining. He is also rather gullible, trusting Kino absolutely even when Kino is teasing him, which leads him to grumble and complain some more. Perhaps his most famous line is "I'm bored." The motorrad is in many ways naive and innocent, and acts very child-like, which tends to be a sharp contrast to Kino's more mature and worldly bearing. Still, Hermes is quite reliable and makes a good companion for long trips. In the Gakuen Kino off-shot series, he takes the form of a cell phone strap instead. (Source: kino.ming-ling.net)
Kino is the lead character in the story and is described as being around 15 years old with short black hair, large eyes and a fearless face. Kino usually wears a black jacket, brown overcoat, white shirt, goggled cap and wide belt with lots of pouches—using special gear depending on the weather or season as necessary. Kino travels with the motorrad, Hermes. The two have a contract—Kino provides the balance, Hermes provides the speed, and together they can travel anywhere they wish. Kino is an excellent marksman with deadly speed and accuracy, and is typically armed with two large-caliber pistols. On the journeys with Hermes, they both try and stay neutral to the situations they come across and avoid getting into other people's business. It is revealed in episode 4 of the anime and the final chapter of volume 1 of the light novel series that Kino is a female. Her name "Kino" is actually the name of the traveler who saved her as a child and caused her to take to her current lifestyle. Her actual birth name is left unstated throughout both the show and LN but there are implications in the anime that it is "Sakura."
These two girls love Ryo, or "Ryo-sama". They made Hikari's and Akari's clothing. They also egg on the love triangle between Takeru, Mari and Hikari. They seem to have some sort of relationship with each other--accented by the fact that they nearly kissed in one episode--but their love for Ryo seems to prevail over it all. from wikipedia
Akari is a young girl that appears just as mysteriously as Hikari. Ryo finds her and makes her part of his family. She often thinks of Hikari as her older sister. Akari is very fascinated by living things like Hercules beetles. Akari would have had feelings for Ryo if Kimi never kept saying they were a family and nothing more In the final episode Ryou was trying to kiss Akari, but she told him "we're family" so that Kimi wont attract them.