Reisen's no villain. She might have gotten off on the wrong foot with some of these characters, and her powers may make her seem bad. But she's also a totally reasonable person (using the term loosely) and it's unlikely she'd betray anyone, since she doesn't know what the other side is like. Just so you know.
~~~~~~
"Hey, Jack, hold on a second," Ryan said. "I'm pretty sure the bunny said something about someone stuck in limbo who should be coming out on this ship. Shouldn't she fix that before heading onto ours, just in case it's someone important?"
Jack grumbled to himself for a moment, then conceded. "Fine, whatever. Go work your magic, and then get yourself and that person off my airship." He floated away, motioning with his scythe for the Hylians and the red hedgehog to follow him. As soon as they were gone, Knuckles turned to the others.
"I don't know about you two, but I think it'd be best if we left our friend alone while she does her job. We should head for your airship."
"You know, I agree with you," Ryan added. "And I already know who our leader should be... Captain Spiny." He started laughing, and Knuckles stared at him, confused.
Shadow just growled. "As long as you don't ever call me that again, I'd be perfectly willing to lead all of you." He skated off, closely followed by Ryan and Knuckles. Reisen watched them leave, then turned back to the dim light and turned her radio back on.
"(You done with the teleport in here?)" she asked, needlessly softly.
"(We had to take a little break for all the others, but we can finish up your friend's jump now. It should only take a--)" A loud crack cut across his voice, followed by static. Reisen stood up to see the light was expanding, and glowing brighter. Just like all the times she'd seen other people teleport in.
Wider and wider the light grew, until it touched the roof and the ceiling. Then, as suddenly as it had started, it fell in on itself, leaving a familiar girl floating in the air. Stepping forward to catch her, Reisen looked down at her clothing and equipment, and smiled to herself. As softly as before, she told the unconscious body: "(Welcome to this world, Youmu-san.)"