>>106828110A lot of things.
She was obsessively protective of what she believed to be her IP: A demon dog with fire on it.
If you were A) a dog vtuber, B) a hell themed vtuber or C) had fire on your head, she would find you, harass you, and send her fans to harass you.
She was obsessed with money and status to the point of kicking the ladder out from under her. It didn't matter how close of a friend you thought she was, it's likely she was going behind your back to sabotage and take away options from you because she believed that she had to do it before you could. All while smiling and pretending to comfort you from your losses as if it were some act of god.
If you were smaller than her, you did not matter and would only be useful if you could A) advertise her merch or B) grant her access to Silvervale in some capacity.
She was so obsessed with Silvervale that she was two steps away from digging in the trash for her used tampons. She NEEDED Silvervale to do a merch collab with her because she believed it would be the ultimate money source. Silvervale wasn't interested in business friendships so she rejected Sinder, but she instead stalked her absolutely everywhere, sent her fans to harass her and spam her chat and discord, and even went so far as to ask random people to lure Silvervale into group chats or meetings so she could pester her for that collab.
Hell, she tried to defend herself with a goddamn 230 page document dedicated entirely to trying to convince people that she wasn't obsessed with sindervale.
God help you if you were both bigger than her and stupid enough to try to befriend her, because her only goal would be to ruin your projects and try to steal whatever benefits you had, be it artists,(Silvervale, ShyLily, Bao, Cottontail, etc.) editors,(Bao) or even your company (Shylily).
And on top of all of this, when confronted over it, all she did was pretend as if she was sorry and then double down on everything.
Pretty scummy behavior.