Waaaay back (like '99~00), some magazine actually asked about Kamijo's pajamas. He said he didn't wear them. IIRC, the way he put it was more like, he doesn't wear anything to bed... But later in New Sodmy times, he said at some summer event that he wears jimbei around the house. Jimbei is a type of traditional Japanese outfit, of cotton, cut loose and boxy, that sorta resembles pajamas.
I don't know what kinds of duties Kisaki has for Undercode, but when an Applause release says "produced by Kamijo", it means he was involved in the actual recording. Kamijo wrote in the FC diary practically every day (just a sentence or two, though) while he was working with Izabel to record "Juliet." Some of the recording sessions were really long, and Kamijo's entry would be like, he slept at the office. But other times it wasn't bad -- when it was Emii's turn to record the bass, they finished in only an hour and Kamijo commented on how skillful Emii was.
Also I think Kamijo gives Izabel a lot of constructive criticism about their live performances. I started going to see Izabel from their 2nd live ever and they weren't very good back then. They've improved gradually, but the most noticeable improvements have always come just after Kamijo attended one of their performances. Sometimes Emiru went too. I think their critiques must have been very detailed and helpful.
Izabel's musical ideals seem to be very similar to Lareine's, even if the sound is different. Back in Izabel's early days they would sometimes come out after the concerts to talk to us for a long time, and once I was able to talk to Hikaru and Chihiro about their musical goals for the band. It's the same idea of expressing a romantic and dramatic world with melodious music. Both Hikaru and Chihiro seemed really dedicated to this; I was impressed.
I want to see Kamijo pose with weapons... guns, swords, riding crops, etc... ^^