It can happen, just be prepared if they do start to get bullied. Easy fix, get a tank divider if it does get too bad. Although, it might cause even more issues dividing them, as you'll have 3 on one side and 2 on the other. If you can get more fish from the same source, I'd highly recommend you getting 2 more. This will help disperse the aggression and keep things under control.
Eddie