User blog comment:Speedo3539/Danganflipa Update and Q&A!/@comment-27117732-20171119052313/@comment-5042721-20171130001258

No, there is not an unsolvable murder in Chapter 5.

Since Gremmie is the main anti-hero of Danganflipa, I wanted to base his personality off of Nagito. Y'know, always being a smart aleck and saying anything he wants to, but he's also really chill, kind of like Rantaro. I would reveal something else about his personality, but it'd reveal Chapter 5 spoilers.