I don't think every single grupo or couple and a killing game needs to have a terrible destiny.
Whenever there is a couple, pair of best friends, siblings, or just a close group of friends really, i sometimes see people acting like it is a MUST that one of them have to die.
It's okay if u make a couple reach the end without one of them being evil, dead or broke up.
I know this is random, but as i know a lot of people are writing fangan just thought it would be cool to appease their fears about this if they have.
If u want to make a couple, best friends or whatever reach the end, u can. It all depends on writing, but u don't necessarily need to make every single group lose someone or break apart
Danganronpa is NOT necessarily only about despair and tragedy. It can also have a happy ending for someone