▁and ▁sister s ▁during ▁an ▁earth qu ake . ▁She ▁accompan ies ▁Little foot ▁to ▁the ▁Great ▁Valley ▁where ▁she ▁is ▁eventually ▁reun ited ▁with ▁her ▁father . ▁She ▁is ▁stub born , ▁bo ast ful , ▁sometimes ▁reck less , ▁and ▁occasionally ▁bell iger ent , ▁but ▁is ▁often ▁made ▁to ▁look ▁fool ish ▁when ▁she ▁is ▁proven ▁wrong . ▁The ▁initial ▁film , ▁and ▁a ▁few ▁sequ els , ▁attributed ▁an ▁e go ▁to ▁her ▁species , ▁especially ▁to ▁herself ▁and ▁her ▁father , ▁but ▁this ▁is ▁dimin ished ▁in ▁later ▁appearances . ▁In ▁the ▁movie ▁In vas ion ▁of ▁the ▁T in ys aur uses , ▁her ▁d ad ▁begins ▁a ▁new ▁relationship ▁with ▁a ▁Three horn ▁named ▁T ria , ▁who ▁C era ▁dis lik es ▁at ▁first , ▁but ▁eventually ▁comes ▁to ▁accept . ▁By ▁the ▁following ▁film , ▁T ria ▁and ▁C era ' s ▁father ▁have ▁become ▁m ates , ▁and ▁have ▁a ▁child ▁named ▁Tr icia , ▁C era ' s ▁half - s ister . ▁ ▁The ▁character ▁was ▁originally ▁conce ived ▁as ▁a ▁male ▁Tr ic er at ops ▁named ▁" B am bo ", ▁but ▁was ▁changed ▁to ▁a ▁female ▁named ▁" C era " ▁at ▁the ▁suggestion ▁of ▁producer ▁George ▁Lucas ▁mid way ▁through ▁animation ▁of ▁the ▁first ▁movie . ▁Hal ▁Hin son ▁of ▁The ▁Washington ▁Post ▁called ▁C era ▁" a ▁fier c ely ▁c ute ▁and ▁r amb unct ious ▁little ▁dynam o " ▁in ▁his ▁review ▁of ▁the