I feel like Ginny wasn't big on other girls when she was little. She was much more interested in trying to keep up with her brothers or hiding behind her mum when she got nervous. She probably got cooed over by Penny a lot though? And she wouldn't have minded that. Portia might have minded though!
Ginny doesn't hate Heidi. But she does think Romilda is a total psycho, so they probably shouldn't get on that subject.