▁family , ▁the ▁own ers ▁of ▁a ▁large ▁cattle ▁station ▁in ▁Victoria , ▁during ▁first ▁half ▁of ▁the ▁ 2 0 th ▁century . ▁In ▁the ▁Tom orrow ▁Series ▁it ▁is ▁imp lied ▁that ▁Ell ie ▁is ▁the ▁great - grand d augh ter ▁of ▁Nor ah ' s ▁brother ▁Jim . ▁The ▁character ▁was ▁also ▁inspired ▁by ▁Charlotte ▁Austin , ▁a ▁student ▁who ▁Mars den ▁had ▁taught ▁and ▁adm ired ▁for ▁her ▁resource ful ness , ▁hon esty ▁and ▁" g uts y ▁approach ▁to ▁life ". ▁ ▁The ▁character ▁of ▁H omer ▁was ▁based ▁on ▁a ▁number ▁of ▁students ▁from ▁rural ▁background s ▁that ▁Mars den ▁had ▁taught . ▁He ▁noticed ▁that ▁many ▁of ▁these ▁students , ▁who ▁at ▁home ▁drove ▁cars , ▁pl ough ed ▁fields , ▁har v ested ▁cro ps , ▁worked ▁as ▁she ar ers ▁and ▁more , ▁had ▁trouble ▁adjust ing ▁to ▁an ▁environment ▁where ▁they ▁" w ere ▁not ▁trust ed ▁to ▁change ▁a ▁light ▁glo be ▁or ▁put ▁a ▁Band - A id ▁on ▁a ▁cut ". ▁These ▁students ▁became ▁fr ustr ated ▁and ▁angry ▁and ▁their ▁imm ature ▁behaviour ▁was ▁the ▁result . ▁ ▁Rob yn ▁was ▁model led ▁after ▁Mars den ' s ▁own ▁sister , ▁a ▁deeply ▁committed ▁Christian . ▁Mars den ▁was ▁inspired ▁to ▁write ▁the ▁character ▁when ▁he ▁noticed ▁that ▁while ▁many ▁te en agers ▁identified ▁themselves ▁as ▁Christians ▁this ▁group ▁was ▁not ▁represented ▁at ▁all ▁in ▁fiction ▁written ▁for ▁them . ▁ ▁Chris ▁was ▁an ▁approximation ▁of ▁Mars