 Donna 's personality has evolved and developed throughout her time on the show . Donna arrives as an obsessed groupie of Ty Harper ( Dean Geyer ) , who manages to force her way into the Ramsay Street teen group . Donna had no one to turn to and buried her love in the music scene and Ty , who became her focus for love and acceptance . Donna is driven by a fierce need for approval and acceptance , which makes her try too hard . Robbie revealed that she shares some of Donna 's characteristics . She said " [ Donna ] ' s fiery and outgoing and I 'm a bit like that . Sometimes I can be too loud and say things when I shouldn 't . But I don 't stalk people . Other than that , we 're kind of similar . " 
