Riku and Kairi hadn't actually worked out a viable way to get off the island during their chat. There had been a few joke ideas and a few farfetched ones they were going to try anyway, but the point still remained; they had no way of getting off the island and to where ever Sora feels he's supposed to be.
He just hopes Sora will let him stay by his side where ever he decides he has to be.
The silver haired teen rolls over in his bed and throws the sheet off. As per normal on Destiny Island, it's hot as hell even though it's cooled off considerably since the sun went down. Riku misses some of the cooler worlds he'd visited on his trips. Hallow Bastion had been a bit chilly, but it was marvelous compared to the sweltering heat the Islands got to. And it's only winter.
At least the sea breeze helps, he thinks to himself.
Three weeks without as much as an idea and Riku is ready to rip his hair out one by one. He can't imagine how Sora feels. The older boy sighs, knowing he's not going to get any sleep tonight, and gets up. After getting dressed, he climbs out of his bedroom window and makes his way down the street.
He lets his mind wander around like a hamster in a wheel with no destination as he wanders the familiar path from his house to Sora's. He's wondering if their Keyblades could get them off the island when he notices something out of the corner of his eye.
The silver haired teen stops where he is on the bridge spanning the old dried up river and tries to focus on the movement he sees. Curious, Riku makes his way towards where the person is walking.
At least it looked like a person. It's dark and, unlike Traverse Town, Destiny Island doesn't have any street lamps for night time. Riku gets a bit worried when he reaches the edge of town and he sees the figure getting on one of the boats they use to get over to the other island. It's a law on the Island that all boats are to be at the dock by sundown as paddling at night can get dangerous, especially if you fall out.
Riku turns to leave and just let the idiot go, but his gut tells him to follow. Sora's always talking about how you're supposed to follow your gut, so Riku gets into his boat that's docked and sets out after the idiot in front of him.
Riku's string of curses is interrupted when he reaches the dock on the smaller island and he spots the other boat drifting away. It hadn't even been tied off. Riku figures if they weren't that concerned with it, he won't be and he sets out down the beach where he can kind of see the figure standing on the isolated Island.
He's not in too much of a hurry until there's a flash of light and Riku instantly recognizes Sora's ridiculous hair. Riku instantly takes off towards the island and watches as Sora, now clad in a bronze and gold suit of armor, tosses his Keyblade into the air.
"Sora! Sora, wait!" He calls, leaping onto the bridge before rushing towards Sora.
He's too late when Sora jumps onto what looks like a jet propelled skateboard and takes off into the sky.
"Sora! Stop!" His heart is racing as Sora flies towards what looks like a portal.
Once he's through, the portal closes behind him and Riku is left standing on the island feeling completely alone.
Sora doesn't know what leads him to their Island that night. But he's here and he feels like this is taking a step in the right direction. His heart is hammering away in his chest as his right arm lifts to cross over his chest and encase himself in armor. He doesn't spend time marveling at himself, his body tells him to go. Now.
He doesn't know how he knew how to summon that ride. But he did and it's exhilarating as he soars into the sky above the islands like it's nothing. There's no wind to whip at his face or sting his eyes and he wants to let out a yell of joy. He's too abuzz with need to get somewhere to do anything else.
He doesn't even know how he opened the portal and made it here. Sora barely even remembers going through the portal from Destiny Islands to here. Where ever here is. It's vaguely familiar, and it takes Sora a minute to realize these are the open fields he, Donald, and Goofy were placed in after sealing the Door to Darkness.
Sora thinks about Riku and nearly panics. He left him on the Island.
Everyone's going to wake up and realize I'm gone, he freaks out.
He turns to go back, but the fields stretch on and he doesn't think he could summon that ride if he tried. His heart gives a painful tug and Sora decides that if he can't go back, he might as well go forward. He can go back and apologize to Riku and the others later.
He heads off in the direction that his heart is pulling him and it doesn't take him long to come upon a large castle. He recognizes it as Castle Oblivion; where he'd met Naminé, had his memories altered, and slept for a year to get them back.
He fears going inside, and logically he knows that the only reason his memories had been altered was because of Naminé but part of him remembers not remembering and he hates that feeling.
It's kind of like the feeling he has right now.
He steels his resolve and enters the castle. It's exactly as he remembers it; pristine and white and intimidating. The ceiling is impossibly high and the entrance hall is lined with pillars.
Sora's heart tugs again. Unlike last time, it looks like he'll be descending stairs instead of ascending them. He moves on auto pilot and before he knows it, he's defeated nearly a horde of heartless and has reached the bottom level. He can't get any farther down, but his heart is telling him to keep going.
He searches the entire level and is rewarded when a panel on the farthest wall opens for him. His heart is beating rapidly as me makes his way into the newly revealed room. The room reminds him of the throne room in the World That Never Was where the Organization had held their meetings only this room is shorter, with only three chairs.
He turns and smiles as his heart stops pounding in his chest.
He's found what he's been looking for.