The moment they joked about Kazuichi becoming the first victim I knew he was staying the long haul, though I kinda wish he hadn't. He's probably the least interesting character in the bunch.
But I feel so bad about Chiaki! I was watching youtube videos after I beat Danganronpa 1 and I saw a tetris block in a thumbnail for related videos out of the corner of my eye. After that I avoided anything related to the series for fear of spoilers, but I spent the ENTIRE game hypervigilant of everything she did or said. I was convinced she was the killer for the 4th trial, since I forgot about the secret passage and figured that only one of the Grape house people could kill Mechamaru.
But the 5th trial, and the end of the game... I felt so bad that I had no faith in her.
I had it spoiled that Chiaki killed Nagito in Chapter 5 but the whole game I was expecting it to be an intentional murder to protect the others or something. Almost like if Kyoko really had killed someone in DR1's Chapter 5.
The fact that it was set up the way it was still an interesting thought process to go through though.
Also, the best part of beating DR2 is I can now search for Dangan Ronpa stuff without fearing spoilers.