[quote=@Forsythe]
It will depend on the individual characters me thinks. I don't want to say before I see the sheets. No sense in everyone being friends if they share no interest, for example your guy sounds science oriented, so he would probably not pay much attention to Helia until he starts looking for his ranger team and sees her protecting others from bullies etc.
[/quote]

Even if they are different, there are ways to have them know each other. For instance, in MMPR, most of the Rangers don't have a whole lot in common, but they are all still friends. Of their few shared interests, martial arts, fitness, and hanging out at Ernie's Juice Bar seem to be among them. If Helia works at Ernie's, chances are she's already well acquainted with the others. 

For reference, here is the first scene of the teens before they became Rangers: [url]https://www.youtube.com/watch?v=G2IF-Q2N0tQ[/url]

Since we all will inevitably be the heroic type, we could say they all became close friends the previous year at some charitable event, perhaps a city-wide trash clean-up or fundraiser.