▁his ▁more ▁quick - w itted ▁sister s , ▁Mel ▁and ▁Lucy ; ▁he ▁does ▁not ▁show ▁much ▁interest ▁in ▁school ▁studies , ▁hence ▁his ▁poor ▁gr ades , ▁although ▁he ▁has ▁shown ▁average ▁signs ▁of ▁intelligence . ▁His ▁interests ▁include ▁roll er bl ading , ▁sk ate board ing , ▁making ▁money ▁and ▁" the ▁g orge ous ▁T ania ▁Thomas ". ▁He ▁also ▁plays ▁the ▁guitar ▁very ▁well . ▁ ▁Lu cia ▁Lucy ▁B ark er ▁( Char lot te ▁Francis ) ▁( 1 9 9 9 – 2 0 0 5 ): ▁Lucy ▁is ▁the ▁young est ▁and ▁most ▁intellig ent ▁B ark er . ▁At ▁the ▁start ▁of ▁the ▁show ▁she ▁was ▁nine ▁years ▁old . ▁She ▁is ▁very ▁tal ented ▁in ▁her ▁school ▁subjects , ▁particularly ▁in ▁Math s ▁and ▁Science , ▁with ▁her ▁favour ite ▁subject ▁being ▁Chem istry . ▁Her ▁above - aver age ▁intelligence ▁means ▁she ▁often ▁b onds ▁with ▁Brian , ▁who ▁has ▁an ▁excellent ▁scientific ▁knowledge , ▁despite ▁a ▁lack ▁of ▁common ▁sense , ▁and ▁they ▁often ▁play ▁ch ess ▁or ▁conduct ▁chem istry ▁experiments . ▁Her ▁best ▁friend ▁is ▁Wend y ▁Richard son , ▁who ▁is ▁equally ▁intellig ent ▁and ▁shares ▁Lucy ' s ▁goal ▁to ▁become ▁an ▁astr onaut . ▁Lucy ▁and ▁Wend y ▁are ▁not ▁very ▁popular , ▁due ▁to ▁their ▁scientific ▁interests . ▁She ▁is ▁very ▁honest ▁and ▁moral ▁and ▁is ▁often ▁the ▁one ▁to ▁set ▁her ▁fost er ▁parents ▁straight ▁in ▁Earth ▁matters ▁and ▁issues ; ▁she ▁easily