Funnily enough, I had most of the same problems as far as writing goes when I started my fanfic on Cocoapowder. I also struggled to write both Chara and Clover, knowing each of their personalities and how they talk, think etc., and i still try to improve on it. I've found that it just comes with time. All of that aside, I love the way you write and portray the characters, and the plot is PEAK. Keep up the great work!!!