hi /an/,

first time poster here, mostly because I never ever had a pet before. But recently I got two hamsters from my classmates, an older grey, Nati and a younger golden one, Liza.
Now the thing is that Nati is really active and human-friendly, yet Liza keeps hiding away, scaring me, who's not really experienced with animal's behavings.

I guess it's natural, but as I never owned pets before; please tell me she's okay.