Aiko, or Ai-chan, first appears as a transfer student from Osaka, which shows from her Osaka accent. Like a typical Osakan, Aiko is also very humorous and often cracks jokes. She's the smart aleck type of the group. One important fact about Aiko is that she has a passion for sports, and is very athletic. She seems to fare better than her classmates and thus makes her popular in the sports department. The only sport she is weak at is swimming. Aiko has no real love interest, but she shows affection for Leon of the FLAT4. Aiko's birthday is November 14, her favorite color is blue, and her instrument is the harmonica. Her family consists of her divorced parents, Koji and Atsuko, and Aiko wishes one day for them to be together again.
The sinister commander of the Neo-Atlanteans, Gargoyle never appears without his mask. His goal is to revive the will of Atlantis and take over the world. To do this he needs Nadia and Nemo's Blue Waters. Cruel, calculating, and deadly, he also believes that he is superior to all humans.
Hanson is 29 years old the brains of the "Grandis Gang" who built the Gratan, the gang's small multi-purpose vehicle. Like Jean, he's into science and has a mild crush on Electra. (Source: Wikipedia)
Another sleeper brought to Second Earth before Yuji. A very powerful sleeper, Yuji strives to improve himself to be able to beat Tony. Tony seems to have no emotion, and is set on destroying the Blue. It becomes apparent in later episodes, however, that he sees himself as a Messiah, and has his own plans for the fate of humanity.
One of the pilots sent to earth to retrieve the sleepers. Joey has a positive attitude no matter what the situation is.He is the first person who gets close to Yuji.
Although Murano is a well known photographer, it is not easy to work with him because he has specialized in photographing women in stripping. These photo shoots where he may end up seeing the very attractive woman naked, make him a lot fun because during the shoot, he can not resist his cheerful grin.
General Logi's shadow Valkyrie serves as her master's sword and shield. She is fanatically loyal to him. Following Valkyrie's demise at the hands of Blue Dragon, an Egyptian-themed shadow called Odin is revealed to be his real shadow. from wikipedia