[KAWAIIdoscope]

One of the few things worse than doing something because everyone is, would be not doing something because anyone else is. It doesn't matter if something is cliche or not, as long as you write it well it has real potential. If you wish to write about characters like this then do so, regardless of if it is brand new or completely common.

In my opinion, writing cliche stories is harder than writing something completely new.

If I may make a suggestion though, I wouldn't be calling Yuri goth/punk/whatever in your mind because the way that you phrase things in your mind can affect your writing. Write about Yuri as a person, going through different stages in her life and just because she is going through a tough time does not mean that she is a sad person. Even if you want an all sad atmosphere in the story don't forget to change the mood a little, show different sides of the characters.

I apologize if I am not very clear, english is not my first language.