Let's see! Regulus and Barty were both one year younger than her in school; Regulus of course tends to harass Muggleborns so they probably get on one another's nerves, I'd imagine (plus they were ~Quidditch Enemies~, and Regulus takes Quidditch very seriously). Barty would have flirted shamelessly, naturally.
Doris knew her! Probably was competitive and bitchy to her one minute and DEFENDING THE SISTERHOOD the next.
Viv and Nick aren't that familiar with her, but Nick's an Order supporter, so there's always that? :D