Thank fuck Riku was such a nerd. Otherwise, Ikki would have no exposure to media.
Between the part of Riku's memories that Ikki had copies of (Riku's life basically from ages zero to fifteen, with some adjustments made by Naminé per Marluxia's instructions (threats)) and the time Ikki had spent on his ridealong as a disembodied spirit inside Riku's Heart, Ikki had a respectable bit of knowledge of popular shows, anime, and music. He was on the fence about most of Riku's anime tastes, honestly, but the music? If Ikki ever had a chance to reformat his memories (without losing his sense of self and/or dying, like Naminé had told him would happen if she tried to fix him), he'd choose to keep the music. All of it.
As Ikki wandered around the city snatching up job applications, he started humming to himself without realizing it. The first time he'd caught himself, he froze, looking around to see if anyone on the street had heard him, or was reacting--nothing. Either no one noticed or no one cared.
This emboldened him, quite a bit.
Ikki just let himself sing. Quietly, of course, but as he walked up and down the Wards, he did two things: he tested out his magic (why couldn't he cast so much as a Dark Shield? what the fuck??), and he sang to himself.
Apparently, he could still use Corridors, but only for relatively short distances--he could pop from one Ward to the next. That was fine. It still made his job search a hell of a lot easier; he'd take it. And even though he'd been robbed of both his Dark Suit and use of the Dark Shield spell, as long as he didn't stay long in Corridors, he'd be fine.
Ikki erupted out of a portal to the Corridors of Darkness mid-song.
"You give me something to think about, that's not the shit in my head…you're a miracle."
He was backtracking to the Cotes Ward to pick up an application at a business he knew he'd missed. He got a little louder while he was fast-traveling, and didn't think about who might listen, who might see.