oo fer , ▁A ria , ▁Twe eter ▁and ▁of ▁course , ▁the ▁title ▁character ' s ▁name ▁itself . ▁There ▁were ▁also ▁segments ▁that ▁feature ▁talking ▁musical ▁instruments ▁that ▁live ▁on ▁the ▁wall ▁of ▁Re ed ' s ▁Music ▁shop . ▁Special ▁character ▁D aph ne ▁Dol ph in ▁also ▁appears ▁with ▁her ▁friend ▁Salv atore ▁Int ieri ▁later ▁in ▁the ▁series . ▁ ▁Over ▁ 1 0 0 ▁original ▁songs ▁were ▁created ▁for ▁the ▁series , ▁under ▁the ▁o vers ight ▁of ▁musical ▁director ▁Don ▁Seb es ky . ▁▁▁ ▁The ▁original ▁decision ▁to ▁use ▁the ▁name ▁Al leg ra ▁for ▁the ▁show ' s ▁protagon ist ▁occurred ▁after ▁cre ator / exec utive ▁producer ▁Jan ▁F lem ing ▁attended ▁a ▁dinner ▁party ▁at ▁the ▁house ▁of ▁London - based ▁academ ics ▁and ▁was ▁introduced ▁to ▁their ▁young est ▁daughter , ▁Al leg ra . ▁That ▁evening , ▁she ▁remarked ▁that ▁it ▁would ▁be ▁a ▁great ▁name ▁for ▁the ▁little ▁girl ▁at ▁the ▁center ▁of ▁the ▁project ▁she ▁was ▁working ▁on . ▁ ▁Char acters ▁ ▁Al leg ra ▁( per formed ▁by ▁Kath ry n ▁M ull en ) ▁– ▁The ▁title ▁character ▁of ▁the ▁series , ▁a ▁ 3 - year - old ▁girl . ▁She ▁is ▁just ▁learning ▁about ▁the ▁world ▁outside ▁of ▁her ▁home , ▁and ▁as ▁such ▁is ▁often ▁quite ▁na ive . ▁She ▁mostly ▁enc oun ters ▁problems ▁and ▁is ▁always ▁re lied ▁on ▁her ▁friends ▁to ▁find ▁a ▁solution . ▁She ▁also ▁is ▁known