(Just for general notes on Kaito in Spider’s body right now, since it matters more for him than the other way around: Kaito doesn’t currently have the pale skin Gunter normally does. That’s hidden with magic, which Kaito doesn’t know how to use, and even if Kaito thought it might be makeup, he has no real reason to go to lengths to hide it himself.

So, minus evil look, he does have the dark skin and tattoo showing. He’s also not aware he has a scar on his back, since he can’t as easily see that as everything else, and he’s not really been so interested as to get a good look at himself without clothes. Bit more concerned with the owner of the body and getting back to normal.
He doesn’t have a grasp on illusion magic, much less hypnosis, and he hasn’t entirely caught on or focused to try and use it. He can control his emotions enough to where nothing happens, though if he’s particularly upset, formless illusions an go off. I’d say when he’s happy as well to where it just slips out, but that won’t be as noticeable and depends on why he’s comfortable. Danger and getting defensive does have it react more, if needed, though not having control also means his energy gets used up faster.
Even if he found where the weapons were at poking around the hotel, he would have them with him nor would he use them. He’s still the same inside, so generally friendly with people, not minding touch, and not wanting to really harm. Tends to smile more and treat people like he usually would, unless he’s specifically trying to convince someone he’s Spider.)