Ryu: He is the main protagonist and is the boyfriend of Arial. He is the rival of Zack for both superiority, who is stronger and because Zack has a crush on Arial. and is the best friend of Danko. Master Reily is said to be Ryu's "grandfather" however, he only found Ryu alone by the shore of his island. So he adopted him making him his grandson. He is the strongest of the heroes and usually has to save everyone. He had littlw to no education due to the fact that as a baby, he was raised by a crazed magezine-obsessed grandpa.
Danko: He is Ryu's best friend and deuteragonist of the show. He and Ryu share similar personalities and seems to connect to each other a lot. Despite being Ryu's best friend, they started off originally hating one another as Danko was always annoyed of Ryu's happy-go-lucky attitude until that is got them to be best friends after facing each other in the Island Shore Entry Exam. He is the third strongest of the heroes.
Zack: He is the coldest of the main characters and the triagonist of the series. He is in an intense rivalry with Ryu as he does not like him because Ryu seems to have Arial in the bag, Ryu seems to be superior and Ryu seems to be stronger. Their rivalry started when Ryu beat him in the Island Shore Entry Exam. Like Danko and Master Reily partly, hated Ryu. He is the second strongest of the heroes.
Arial: She is the only girl on the show and the quadragonist of the show. She is beautiful and a very responsible young woman. When Ryu appeared on the island to stay when being older, she was the only one to befriend him and already accept him. When he beat her at fighting, she complimented him. Arial has a crush on Ryu and they become a couple in the second season.
Master Reily: He is the master of the heroes that teaches them to become stronger. He was originally against the idea of letting Ryu becoming an official student there but accepted him when Ryu beat all four of them. From there on, Master Reily and his "grandson" grew even closer and closer like they were grandpa and grandson.
Master Reily is teaching all of the students how to communicate without speaking but through their mind. However, Danko is struggling to do so and is outcasted by the Spiritual Gods. He and Ryu then ventures to the Spiritual Gods to ask why can he not achieve the ability.
The owner of the island wants to kick Master Reily and his crew off of the island, however, he refuses to not let them stay when Ryu beats him. He then says that Master Reily must fight him on the roof of the island's Mounty House to settle the feud.
Zack finds a sap that turns him invisible, he then uses that to make himself superior to Ryu. Meanwhile, Master Reily tries to hunt Danko down for eating his last peanut butter bar.
"The Invincible Gargantuan"
Sarah Jane Cunningham &
August 9, 2002
Ryu has a planned date with Arial but misses it when he accidentally awakens an invincible beast. He then tries to find a way to defeat it and make it up to her. Meanwhile, Danko and Zack tries to steal some of the fresh coconuts.
"My Master's Mentor"
August 16, 2002
When Master Reily is visited by his mentor, he is forced to leave unless his mentor can be defeated. Ryu then trains him. Meanwhile, Arial blackmails Zack and Danko into doing her bidding.
"Battle of the Bands"
August 30, 2002
When the Islanders challenges the heroes to a battle of the bands, they agree but they cannot agree on anything. Ryu then goes on a quest to find out what are they each good at and get back before the competition starts.
It is that time of year where it is about giving and not recieving. However, a man plants a curse on the heroes that delivers them no Christmas presents. The heroes then sets out to find the man and gain their Christmas and the island's Christmas as it affected the whole island.
The heroes goes on a quest to Zcandavia to find out the origins of their ancestors. When Ryu has no memory of his past and the townsfolk has no clue either, he heads to a fortuneteller that tricks him into believing it was kept a secret because Ryu would turn evil.
Master Reily sends Ryu and Arial on a mission to retrieve the the sacred water. They both try to bond with each other however, Zack tries his very best to make them angry at one another as Danko tries to stop Zack. NOTE: Ryu and Arial becomes a couple and kisses in this episode.
Master Reily states that he has prepared everyone for the Dark Evil Lord that is coming. When it does come, it imprisons Ryu and Zack in a Hex Capsule in the middle of the ocean. The two then tries to settle their rivalry and works together as Master Reily and the others fights the dark lord with the Tiki People.
As Zack and Ryu races back to the island, everyone is defeated and Master Reily is holding his own. When they arrive, they fight but are no match. Ryu then unleashes everything he has ever learned but is still no matched. Ryu then uses his Hidden Power (that he only shows in this episode and in the first episode of the show and in the 2 movies) and beats the Dark Lord. Everyone is then thanking Ryu and Arial kisses him again as they all get ready to fight the Dark Lord's Remains.